Thread Number: 86856  /  Tag: Vintage Dishwashers
Why Did Older Dishwasher Have Such Enormous Motors?
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Post# 1114196   4/10/2021 at 14:09 (1,468 days old) by chetlaham (United States)        

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I mean why were they so big considering modern dishwashers get dishes clean with a 50 watt motor?

 

Why not make a two port sump (think plastisol tubs) and add a removable find filter basket?  180 watt wash pump like this:

 

https://www.ebay.com/itm/GE-Washer-Drain...

 

And a 25 watt drain pump like this but in shaded pole version:

 

https://www.ebay.com/itm/GE-WD19X10015-D...

 

Frog eye or cat eye spray arm with small holes. Continuous advancement timer (like on GE machines) where the drain pump starts and the wash motor shuts off 30 seconds latter. Similarly after the drain pump shuts off, fill starts and 30 seconds latter the wash pump comes on. 

 

I think this would have been cheaper, used less water and reduced carry over water found in many designs.

 

Why not have gone this route? Speed Queen could pull if off today if we wanted a no frill machine but also respected modern design. 





Post# 1114370 , Reply# 1   4/11/2021 at 23:12 (1,467 days old) by rollermatic (columbus and milford ohio)        
i'm of the old school

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i have a lot of old dishwashers and the bigger the motor and the more water they use the better in my book! but i'm into them for the nostalgia of it. the old hobart kitchenaids had 1/2 hp motors, the gold seal motor they called it. i have a bunch of kitchenaids, over 20 and i have never had a problem with a motor yet! i've had lots of other issues, but not those powerful motors. hobart used to advertise them as lasting longer because the bigger motor would be under less stress.

and i think the rest of them used 1/3 hp motors, most of them 3450 rpm, but hotpoint used a 1/3 hp 1725 rpm on it's old machines, i have 2 of those plus one new extra motor. they used a big wash pump with a big water slinger impeller since their motors ran slower. but the g.e. mobile maids used a 3450 rpm 1/3 hp motor.

not sure what maytag and whirlpool used, although i do have a maytag front load in harvest gold from early 70's that has a horizontal pump and motor and it's gotta be at least 1/3 hp i would guess.

i would say back in the early days no one was concerned about energy usage and the idea was to build these machines to last which indeed they do or we would not have all these great 50 year old machines still working fine! and they had powerful pumps and used a lot more water because again no one was worried about water usage. these new machines i have no respect for, they drizzle a cup full of water around and take 2 hours to do a load, please! give me a water guzzling kitchenaid or frigidaire any day! but then i only run them for hobby so energy usage is not an issue. at least with me.

manufacturers definately believed bigger was better!


Post# 1114380 , Reply# 2   4/12/2021 at 03:02 (1,466 days old) by qsd-dan (West)        

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Big motor + lots of hot steamy water + brute force + phosphates + bleach was how the dishes got cleaned in a timely manner.

Whirlpool Ultrawash/Power Clean dishwashers were still using a 1/3 HP motor through 2010. Detergent with phosphates and bleach were available through 2009, so it wasn't all that long ago.


Post# 1114391 , Reply# 3   4/12/2021 at 06:27 (1,466 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        
1/3hp = 250W

More power usually means more water moved at higher pressure and/or speed.

Modern DW actually do the same often: Variable speed pumps often ramp up for intensive or quick cycles.



Efficiency is another matter:

While motors in general are relatively efficient, these motors more often than not were asynchronous motors - probably the "least efficient" of all of these.

Still pretty efficient (over 90% I'd guess) but not quite what today might be possible.

So you'd have to subtract that.





Efficiency of water path designs and pumps themselves were lower as well.

Fluid dynamics is a complicated and frustrating science.

Without computer simulation optimization was just not quite at the point we got to today.




Detergents just called for high mechanical action and large water quantities as well.

They weren't quite at todays standard, so more solvent (water) and more movement of that just forced things along.





And silence and efficiency just weren't jet asked for.

Getting the job done well was the first task.
Then they looked at makeing the machines cheaper.
Then efficiency came up.




Adding the lack of alternating spray (efficiency addition) and you could probably equate 100W today would be equivalent for 250W in a machine back then.


Post# 1114455 , Reply# 4   4/12/2021 at 18:23 (1,466 days old) by kenwashesmonday (Carlstadt, NJ)        

As one one of the few who still uses a portable full-size dishwasher that get's parked in front of the sink, I appreciate a machine that finishes in a reasonable amount of time.  My 18 year old Maytag Jetclean portable runs for 51 minutes on 'light wash' and does a fine job.  I dread the day that I have to replace it.


Post# 1114488 , Reply# 5   4/12/2021 at 22:15 (1,466 days old) by AcesUp8000 (Canada)        

1/2 Horsepower Motor

The KitchenAids from the 15 Series to the 21 Series used the 1/2 Horsepower motor that was made by Hobart. Once Whirlpool took over KitchenAid, I think they eventually made these dishwasher motors weaker.


Post# 1114572 , Reply# 6   4/13/2021 at 17:55 (1,465 days old) by johnb300m (Chicago)        

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I can verify that even when “evil” Whirlpool took over KA, they still had “gold seal” 1/2 hp motors up to the 23 series.
Only in the 24 series fully on the PC platform is when the motors went to 1/3hp.


Post# 1114613 , Reply# 7   4/14/2021 at 10:37 (1,464 days old) by vacerator (Macomb, Michigan)        
When they used to

really clean dishes well too! They cheapend the motors and pumps, and raised prices of course.

Post# 1114857 , Reply# 8   4/17/2021 at 07:50 (1,461 days old) by combo52 (50 Year Repair Tech Beltsville,Md)        
KA DW Horsepower

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The KD10-14 machines had a 1/4 HP motor and the KD15-22 machines had a 1/2 HP motor.

 

Whirlpool did claim that the KD23 series had a 1/2 HP motor but it was the same size as the standard WP DW motor which was rated at 1/3 HP.

 

These large split phase motors were reliable but only about 30% efficient at best at converting power used to washing power.

 

John L.


Post# 1196806 , Reply# 9   1/9/2024 at 16:40 (464 days old) by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
my thoughts

I believe that having a big motor equals power in every way, including spray and drain power. These are my thoughts.

Post# 1196923 , Reply# 10   1/11/2024 at 11:43 (462 days old) by norgeway (mocksville n c )        
The 1725 Hotpoints

Worked ok, but were the all time noisiest dishwashers ever made.They sound like a garbage disposal fighting a chainsaw lol.

Post# 1196936 , Reply# 11   1/11/2024 at 16:36 (462 days old) by Maytag85 (Sean A806)        
Reply #10

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Hans, wasn’t that the particular model you mentioned at the wash in back in 2019 you “wouldn’t miss more than an abscessed tooth” when I asked if you missed that particular model of dishwasher?

Post# 1196967 , Reply# 12   1/12/2024 at 07:52 (461 days old) by volvoman (West Windsor, NJ)        
@ Reply 4

This.

My wife and I have a portable Whirlpool that hooks up to the sink. I'd take a venture that it's close to 30 years old, if not more. It's loud. It uses a ton of water. And I guarantee you that it cleans better than anything currently on the market. It's not a Power Clean (it's actually kind of basic? Maybe an MOL?), but it'll blast the crud off anything you throw in there.

Contrast that to the fancy, HE-style dishwasher that we have in our timeshare, which takes HOURS to complete a load, and still leaves the dishes disgustingly wet.

We don't care about energy or water conservation. We want a machine that'll do the job well - and fast. We've already made the decision that if this one goes, we'll either find someone to re-build it, or we'll scour the classifieds for a used one.


Post# 1197010 , Reply# 13   1/12/2024 at 22:22 (461 days old) by combo52 (50 Year Repair Tech Beltsville,Md)        
Older, whirlpool, dishwasher

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Hi Steve, what model were portable dishwasher do you have? They made several different styles over the years.

I have two 35-year-old whirlpool built-in whirlpools in my kitchen. I do have concerns about some of the aspects of the new machines they do get dishes very clean, however.

But I like the cycle times of the older ones in the fact that they will wash away so much food soil without ever ever having a filter to clean.


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Post# 1197064 , Reply# 14   1/13/2024 at 20:28 (460 days old) by Launderess (Quiet Please, There´s a Lady on Stage)        

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My vintage GE Mobile Maid has a giant whopping motor and can move water like no one's business. No wet wipe dishwashing here, machine actually will shimmy and slightly move about from force of water.

Sadly all that brute force has ruined no small amount of dish and glass ware so that's me for you.


Post# 1197757 , Reply# 15   1/23/2024 at 12:51 (450 days old) by DaveAMKrayoGuy (Oak Park, MI)        

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Supposedly now, those smaller motors can do more, maybe with advanced technology doing more than we'd thought--or maybe they're strong to the finish 'cause they must eat lots o' spinach...!

 

 

 

-- Dave


Post# 1197761 , Reply# 16   1/23/2024 at 13:24 (450 days old) by chetlaham (United States)        
Reply 13

chetlaham's profile picture
That pictures wells up a lot of emotion in me, including deep sadness and longing. I wish that PowerClean was still being made today. No other dishwasher comes close in the history of humanity. If everyone was like me that dishwasher would be in every kitchen across the globe and the heater wouldn't cut off after the thermal hold... Sadly when the tall tubs were introduced people began buying them and it only increased. Whirlpool was clever, they had the point voyager which kind of mimicked the power clean to help get a certain number people on board with the idea- as if nothing was missing- then quietly switched to the filter design. All around messed up. I dislike how passive and naive people are.

Post# 1197762 , Reply# 17   1/23/2024 at 13:28 (450 days old) by qsd-dan (West)        

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Smaller motors don't do more work, they just run 6 times longer to get the same job done. Instead of 20-30 minutes during the wash and rinse cycles, it's 1-2+ hours. Between weak designed motors to save electrical costs and reduced water levels to save water, dishwashers are quickly heading towards alternating wash arms as being the norm. Probably expect longer cycles times from them in the future.

Post# 1197771 , Reply# 18   1/23/2024 at 15:12 (450 days old) by combo52 (50 Year Repair Tech Beltsville,Md)        
About 90% of dishwashers

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Have been alternating wash arms for over a decade now, this practice fix the dishwasher quieter, allows it to have less water that has to be heated in the machine, and generally does an excellent job

By any measure newer dishwashers today get things cleaner than the older machines ever could that’s the advantage of a long cycle. It will soak things off and then scrub them off that older dishwasher couldn’t touch, except on the very long and energy intensive pots and pans cycles that a few machines had.

John


Post# 1197852 , Reply# 19   1/24/2024 at 20:25 (449 days old) by norgeway (mocksville n c )        
I hate to admit

Anything new is worth anything, But John is right, I have a 2 year old GE dishwasher and yes it takes a long time, but it cleans perfectly, burned on casseroles etc come out spotless.

Post# 1197853 , Reply# 20   1/24/2024 at 20:45 (449 days old) by appnut (TX)        

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My Bosch will cease alternating wash arms and run both arms simultaneously for the majority of the main wash if it senses heavy soil.

Post# 1197858 , Reply# 21   1/24/2024 at 22:17 (449 days old) by qsd-dan (West)        

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Yeah, I'm aware of longer cycles cleaning stubborn items. For years, I have posted pics my KDS-18 with an externally mounted switch to the timer motor that I can stall anywhere during the entire cycle. Thing is, stalling the timer just an extra 10 minutes or so during the wash cycle (pretty much doubling it) achieves the same results as hours on a newer dishwasher. It's extremely rare that I burn anything since I was never a fan of consuming hot foods or drinks.

BTW, the home I moved into almost 4 years ago came a Kitchenaid dishwasher from 2012 in the main kitchen. The KDS-18 resides in the kitchenette for occasional fun use now. It's quiet but sucks even with pots and pans with every single option selected. And that's on mechanically softened water. I make and eat a lot of homemade soups and it leaves residue all of the time, every time in my clear glass bowls. I never had that problem with 18 on very hard water and extremely short wash cycles before installing timer motor switch. I'm not worried about the residue as it's clean enough for me but I don't use those dishes when company is around. I'll take pics of my next load. My brother has virtually the identical dishwasher he bought brand new, just with top controls rather than front. I quickly understood why they rinse every dish under the kitchen faucet before putting it in the dishwasher. They get away with using the normal cycle using this method.

Noticed when I mention alternating arms, I said it quickly becoming the norm, not something newly released.

So John, when are swapping out your 80's Powerclean for a new dishwasher ;)


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Post# 1197860 , Reply# 22   1/25/2024 at 00:02 (449 days old) by chetlaham (United States)        

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Dan, you bring up a good observation. Higher water pressure (mechanical energy) in a vintage machine can in theory achieve the same results as a modern machine but requiring less time.

With cool water Powercleans did that. At 8 minutes into the Main wash they would do a thermal hold until the water was heated to 140*F which extended the main wash considerably.


Post# 1197879 , Reply# 23   1/25/2024 at 11:33 (448 days old) by qsd-dan (West)        
With cool water Powercleans did that.

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Agree, it was a good balance of power, fast time cycles, and clean results. A couple of other designs had the right balance too but the reliability wasn't there (mainly in the electronics), like some of Maytags post RR dishwashers.

Most users today want a dead silent machine and it's just not happening with a 1/3 HP motor. The EPA wants the machine to use a trickle of water and electricity which throws more obstacles into the game. Manufactures today want to build the platform as cheap as possible and have it last just past the warranty and die soon after to boost profits.

And here we are.


Post# 1212365 , Reply# 24   8/16/2024 at 22:32 (244 days old) by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
to chetlaham

I will never forget when my mom said, "This dishwasher sucks!" Mind you, this was in 2008. There was crud stuck in the glasses in the corners, forcing us to use pots and pans and soak and scour for everything. This wasin the Whirlpool Gold dishwasher. My mom got a Kenmore back in 2011 which was the filter design and it did clean the glasses, shockingly. It was the new filtration design. the Whirlpool point voyager went to my dad who used it from 2013-2016. Sadly, nearly all dishwashers use that stupid alternating wash arm action, even Maytag. This is a sad state of affairs as far as I'm concerned.

Post# 1212376 , Reply# 25   8/17/2024 at 07:16 (243 days old) by chetlaham (United States)        

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Sadly, all true Dan. Big motors are noisy and reduce capacity at face value- so few want them now. I say at face value in that while a tall tub can hold more dishes, nothing is gained with any type of scrubbing, pre-rinsing, or pre-washing as with so many of today's tall tubs.

 

 

Nothing can outperform a Whirlpool Power Clean Filter module. It is the true definition of loading baked on, dried on, nasty without any type of pre-treatment coming out spotless with minimum water and energy.

 

The following is what a real dishwasher looks like. Simple and cheap, energy efficient- yet long lasting lasting, no nonsense, and 100% clean.

 

40 minute main wash, heater runs the whole time to achieve temps in excess of 150*F, lots of pressure and water movement, plus the famous soil removal, retention and flush away of the PC module.

 

 

The fact that nothing like this has ever been built is everything that is wrong with the world.

 

 

Enjoy! :)

 

 

 

 

 

 

 

 

 


Post# 1212377 , Reply# 26   8/17/2024 at 07:30 (243 days old) by chetlaham (United States)        
Real Dishwasher

chetlaham's profile picture

Jerome, want a real results? You need several things:

 

 

1) Main wash water temps over 150*F, preferably 180-190*F.

 

2) Main wash times of at least 30 minutes, preferably longer.

 

3) water volume

 

4) water pressure

 

5) multi directional targeted water distribution

 

6) strong maceration

 

7) High capacity fine filter

 

8) particle flush away

 

9) Long heated detergent prewash (if needed)

 

Every dishwasher ever sold has been some combination of these 9, but never has anyone actually sold a dishwasher that managed to meet all 9 in the high notes despite being feasible with minimal engineering.

 

People are being sold jokes Jerome that always manage to come centimeters close to the itch but never actually scratch it, thats for sure. 

 

 

 

 

 

 


Post# 1212395 , Reply# 27   8/17/2024 at 10:56 (243 days old) by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
to chetlaham

Sadly, most joes and janes don't care. As far as they're concerned, as long as they're silent, it's fine with them. I want to hear my dishwasher doing something at least spraying the water around. That's how I know it works. Period. This is why I wish dishwashers had clear glass windows.

Post# 1212398 , Reply# 28   8/17/2024 at 11:08 (243 days old) by chetlaham (United States)        

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Well I think to a degree they do care- you've got folks pre-rinsing without fully realizing its a reaction to the fact most modern dishwashers (and even some old ones) just can't clean like a Power Clean Filter Module, Hobart Kitchen-Aid or Maytag JetClean. 

 

 

If everyone was like me the Power Clean Filter Module with the above wiring diagram and cycle sequence would probably dominate being in 98% of all Kitchens. I say probably, because chances are that Power Clean Module would be complimented with a water inlet temperature booster and a second set of fresh water spray arms as seen in commercial dish machines.

 

    https://www.jacksonwws.com/wp-content/uploads/2016/10/DishStar-LT-Front-766x640.jpg

 

 

Ignore the the energy star label, its won't mean a thing in my world ROTFIL!!!!!!! smile


Post# 1212488 , Reply# 29   8/18/2024 at 14:40 (242 days old) by johnb300m (Chicago)        

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Oh look, another Lazarus thread….

Post# 1212489 , Reply# 30   8/18/2024 at 14:51 (242 days old) by johnb300m (Chicago)        
#25

johnb300m's profile picture
This dishwasher uses 13.2 gallons?
GTFH.
Nobody wants that anymore.
Even the toughest cycle on a late 90s Powerclean only used 11gal.
Enjoy pissing your electricity and water down the drain.


Post# 1212491 , Reply# 31   8/18/2024 at 15:07 (242 days old) by Maytag85 (Sean A806)        
Reply #30

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You’ll use more water washing dishes by hand than if you were to use a dishwasher, even a dishwasher that uses a little over 13 gallons of water.

Post# 1212503 , Reply# 32   8/18/2024 at 16:05 (242 days old) by qsd-dan (West)        
This dishwasher uses 13.2 gallons?

qsd-dan's profile picture
My KDS-18 uses 16 gallons and it doesn't bother me in the least, especially when compared to running 45-47-ish gallons PER load in my 806 with it's modified spray rinse cycle.

Vintage water hogging dishwasher, vintage 4-5 gallon toilets, and vintage top loaders. Ya know what my water bill averages per month? $25-$30.


Post# 1212539 , Reply# 33   8/19/2024 at 04:22 (241 days old) by chetlaham (United States)        
13.2 Gallons

chetlaham's profile picture

 

@Johnb300m- Please I politely ask you to stop with the negativity. Post #29 adds nothing of value to the discussion.

 

 

Anyway, yes, the Heavy wash on this dishwasher does indeed use 13.2 gallons of water per cycle. The timer can be started in 3 places:

 

 

Heavy- 13.2 Gallons

 

Medium - 11 Gallons

 

Light - 8.8 Gallons  

 

None of these cycles waste water or electricity- on the contrary they save order of magnitude more water and electricty as there is no need to manually pre-rinse, prewash, soak, scrub, use the rinse and hold cycle, afresh cycle or the need to clean the machines filter. All that is taken and done by the machine.

 

The water ussage here is the ideal amount needed to realistically clean dishware unlike the DOE energy cycle which only takes water and energy usage at face value without evaluating actual performance short and long term. There is even an extra fill and drain in the rinse cycle to let the user generously dose on detergent worry free (if needed) and to aid in soil carry away post main wash. Dishes in this machine actually go in untouched besides scrapping. Water should never touch used plates until they are actually in the dishwasher.      

 

 

 

 

 

 

 

 

 


Post# 1212543 , Reply# 34   8/19/2024 at 06:47 (241 days old) by Combo52 (50 Year Repair Tech Beltsville,Md)        
Adding nothing to the discussion lol

combo52's profile picture
Chet and Jerome You are in the classic Appliance thread where we talk about vintage appliances and problems. Everything you two guys have posted is just make believe it has nothing to do with anything.

U2 can talk among yourselves on the message board etc

This is not an attack on you guys personally, but the site is not intended for make-believe drawings, these things can go in the super forum if you’d like I suppose, but label it as make believe don’t try to act like this is a serious discussion, please

John


Post# 1212549 , Reply# 35   8/19/2024 at 07:35 (241 days old) by chetlaham (United States)        

chetlaham's profile picture

@ John- cite the forum rules stating personally made or fair use drawings, pictures, re-productions, schematics, cycles, or modifications pertaining to vintage appliances shall not be posted or discussed on AW.org.      

 

 

@Johnb300m:

 

I've got 3 BOL cycle sequences that use only 8.8 gallons of water- however unless you pre-rinse your dishes well I highly doubt you'd want to use any of these three cycles or have the same water going around for 30+ minutes even though you would probably still get good results with the Power Clean Filter Module. IMO you need extra water for pre-washing and pre-rinsing excessive soils associated with dishware that has not been pre-rinsed. 

 

Variant one, long heated rinse for best drying-

 

imgur.com/a/5cPMgy4...

 

Variant two, shortened rinse- 

 

imgur.com/a/LrWl7bE...

 

Variant three, long main wash for baked on soils, no time given for building thermal inertia in the rinse, heated dry increased by 6 minutes to compensate- 

 

imgur.com/a/XdzK8vG...

 

Jerome let me know what you think and what you approve of.

 

 


Post# 1212575 , Reply# 36   8/19/2024 at 12:17 (241 days old) by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
to chetlaham

I like them all.

Post# 1212579 , Reply# 37   8/19/2024 at 12:58 (241 days old) by chetlaham (United States)        

chetlaham's profile picture

I worked hard on them, even had to do the math. My head hurts LOL. I'm glad you like and approve of them, that means a lot to me.

 

 

I think one of the best things would be getting rid of the thermal hold for a fixed period of heated time in both the prewash, mainwash and final rinse. This lets the water temps exceed 140*F, giving that true Potscrubber performance. It also increases reliability as I've read online threads where Power Clean timers would fail by stalling out at the thermal hold and not advance even when temperatures were satisfied. Ditching all the thermal hold wiring and switching to an energy efficient low vibration permanent split capacitor motor frees up contacts in both the 6 and 8 contact row timers for things like various indicator lights and staggered timed heat. A cycling contact can provide intermittent heat for China washes while a long duration close contact can provide Pot and Pans heating as similarly done with high end dura-wash dishwashers to achieve normal vs hi-temp options. Much less to go wrong. 

 

Option buttons will control heat, knob will control the number fills for MOL and up models.   


Post# 1212604 , Reply# 38   8/19/2024 at 16:43 (241 days old) by qsd-dan (West)        

qsd-dan's profile picture
Eh, thermal hold is a great idea, just make the components more robust so they don't fail as easy. I'm assuming it's the contacts that fail from being burned/pitted.

Thermal hold to 150F for wash cycles, final sani rinse 180F. That should be hardwired in and not de-selectable. A 180F final rinse eliminates the need for heated dry. Pop the door open after draining in the final rinse water and flash dry.


Post# 1212641 , Reply# 39   8/20/2024 at 03:55 (240 days old) by chetlaham (United States)        

chetlaham's profile picture

Alright Dan, now you've done it. 30 minute heated rinse! I'm still including a dry, I like my dishware baked!

 

 

The thing is water coming already hot (+145*F) will trigger a short main wash (12 minutes) when the time needed to scour dish and bake-ware (30-40 minutes) would provide ample time to heat the water as it is.

 

I feel like thermal holds were a way of the past by not penalizing users who had hot water. Those with 150*F tanks could still enjoy normal cycle times or at least normal for that period of time.

 

A 150*F thermal hold followed by a 180*F thermal would require two thermostats, or one stat with a bias heater further complicating things. Robustness is a key ingredient in any appliance, however simplicity will always take it to the next level eliminating at least one more thing that can go wrong when millions of machines are in use. Small 0.001% problems become problems on a grand scale. Also ff something does go wrong (like the heater giving out) there is no fail safe as the machine will run indefinitely until manually stopped. Personally I really don't like the concept of breaking busses in the timer, re-feeding, extraneous switching or stalling the timer based on external inputs.   

 

 

I've always like GE's approach. They moved away from temperature sensing based water heating on their EM models and built the time into the main wash and rinse cycles. I like the idea of the timer being absolute, at the top running above all else switched across the line by a single contact having the final say in any cycle sequence.   

 

 

 

 




This post was last edited 08/20/2024 at 06:46
Post# 1212643 , Reply# 40   8/20/2024 at 06:31 (240 days old) by Chetlaham (United States)        
GE's Water Heating

chetlaham's profile picture

I like GE's latter model Potscrubber water heating system the best. The timer runs continually through out the entire cycle, being at the top of the circuit switched by only one master timer contact (0M-0T) that does not open until the timer advance out of the dry period. Where a thermal hold would normally be present, GE uses a 29 minute delayed timer increment with a dedicated "Wet Heat" 4M-4T water heating contact. This contact is hard wired and can not be over-ridden, mimicking a forced thermal hold. If extra heat is desired to obtain water hotter than normal, achievable by selecting "Potscrubber" or "Water Heat", 10 minutes of heat is added around the delayed increment, in the first pre wash and in the final rinse for a true high temp wash experience. Depressing "Water Heat" closes push-button contacts 9-10 and 14-15 connecting the water heat light and supplementary 6M-6T "Heat Boost" contact to the heating element circuit. This illuminates the water heat light every time the heating element is energized letting the user know tub water is being heated much the same way some Whirlpool dishwashers illuminated a heating delay light when doing a thermal hold.  

 

 

In any case all cycles have a long 40 or 43 minute main wash regardless of the incoming water temperature. Heating temperatures and cycles are achieved by the amount of time the heater is engaged in the cycle rather than the amount of time the timer is stalled. Just my preference. smile

 

 

 TOL Dura wash machines use a similar concept.

 

As an example a TOL GE built Amana: 

 

 

 

 

 


Post# 1212644 , Reply# 41   8/20/2024 at 07:29 (240 days old) by Chetlaham (United States)        
Dura Wash Time Based Heating

chetlaham's profile picture

This is another water heating system I really like and I wish was used on the Power Clean Modules. Pots&Pans and Hi-Temp wash is achieved by adding heat at various parts of the cycle.  For example, contact 6 provides 24 minutes of mandatory water heating in the main wash, 80 seconds of mandatory watering heat in the first post main wash rinse and 5.3 minutes of mandatory water heating in the final rinse. Depressing Pots & Pans connects timer contact 7 to the heating element circuit providing 5 minutes 20 seconds of water heating through the first pre wash. This heat differentiates the same number of water change outs between being classed as "Pots and Pans" vs "Heavy Wash" Depressing push-button "Hi-Temp Wash" connects timer contact 8 to the heating element circuit providing 2 minutes 40 seconds of water heating in the main wash and 8 minutes of water heating in the final rinse.  

 

 

Interesting concept I'd like to see stretched. Having the number of water change outs and time dictated by the user selection of the dial, while an array of options like "Pots and Pans" "Heavy" "Normal" "Light" "Low energy" "China Crystal" "Hi-Temp Wash" and "Hi-Temp Rinse" would dictate the amount of heat added to the Prewash, Main Wash and Final Rinse.   

 

 

 

 

 

 

 

 

 

 

 

 

 


Post# 1212708 , Reply# 42   8/21/2024 at 12:41 (239 days old) by Ragnboneman (Ontario)        

I never have prints that tell me much anymore in the industrial electrical equipment I work on.
In the good old days you might spend an afternoon doing a repair and finding a bad contact that held up a sequence..
Now its digital and its much harder to understand what is going on without a computer hooked up....

Lovely lovely prints, tell a story..


Post# 1212716 , Reply# 43   8/21/2024 at 14:37 (239 days old) by Lavamat_jon (UK)        
13 gallons = 50 litres

That is an awful lot of water, and you won’t see that implemented on any machine nowadays. Whilst fine for us few collectors who admire and run the old machines, for the average person with a modern machine that is just far too much, and such a waste if the whole population collectively uses 5 times as much water to wash their dishes.

Most modern dishwashers in Europe can pre wash, wash, and rinse multiple times using 8-12 litres (approx 2-3 gallons) water and around 1kWH. And guess what - everything comes out to a high standard.

Hell, even some of my 20+ year old vintage washing machines use less than 50 litres to wash an entire load of laundry.

Attached are photos of a burnt on pasta bake dish from the other night, washed on the intensive cycle with just 12l of water, 1.2kWH and 5 water changes.

In this modern age that sort of waste is unacceptable.


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Post# 1212724 , Reply# 44   8/21/2024 at 15:59 (239 days old) by chetlaham (United States)        

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@Lavamat_Jon: What happens to all the food solids in your machine? Is there a macerator? Don't take this the wrong way but I can't picture these UK machines passing a cake test like the Power Cleans could. Or be as easy to service. Or as long lasting.

 

 

I do thank you for the backed on pan coming out clean. That does sway my opinion in favor of your machine- you have proved that your machine is capable of scrubbing.


Post# 1212736 , Reply# 45   8/21/2024 at 17:28 (239 days old) by Maytag85 (Sean A806)        

maytag85's profile picture
“In this modern age that sort of waste is unacceptable”

Again, you’ll use more water (possibly electricity as well if the water is heated electrically) washing dishes by hand than if you were to use a dishwasher that use a little over 13 gallons of water.



Post# 1212741 , Reply# 46   8/21/2024 at 17:52 (239 days old) by Chetlaham (United States)        

chetlaham's profile picture

Sean, I'll be honest. Excluding the bake dish, I have a feeling that a certain amount of pre-rinsing is going on in Europe. I'm not saying Lavamat is pre-rinsing, just the average EU person in general. Water should never touch anything prior to going into a dishwasher.


Post# 1212754 , Reply# 47   8/21/2024 at 23:52 (239 days old) by Lavamat_jon (UK)        

Chet,

All European dishwasher use the micro filter system, water is filtered during recirculation and any coarser food residues are drained away if the detergents and enzymes haven’t already done their work in breaking them down. It’s a system that works very well here, cleaning the filters is a quick 2 minute occasional, no-fuss job. Macerators just aren’t used or are necessary here.

Miele for example always used to use the cake test and passed with flying colours each time.

There are reliable and unreliable brands here just as in the USA - but one thing for certain is that most machines nowadays here are very energy and water efficient (and to be honest have been for years). An appliance’s efficiency doesn’t correlate to reliability or build quality.

Pre rinsing is not a practice that is common here. Of course there’s always going to be people who pre rinse at the sink wherever they live in the world, but the general attitude here is to scrape any food scraps into the bin before loading the dishwasher and not to pre rinse. Dishwasher detergents advertise aggressively here to those few who still pre-rinse, but as I imagine as is the same in the USA those people aren’t going to change their mindset. I find it amusing that people buy a dishwasher to save them a job, but still carry on doing that job in addition to then stacking the dishwasher.

The only water I use at the sink as part of cleaning up after dinner is a small amount with washing up liquid (dish soap) to wipe down the surfaces, and a negligible amount of cold water to rinse out any plastic containers, or tins/jars etc that go out for recycling.

Sean,

A machine using more resources than another to do exactly the same job to a high standard is the very definition of waste. You’ve overlooked the point I was making - I fully agree with you that using a dishwasher uses less resources than the sink. Modern dishwashers (and even most European models made in the last 20 years or so) use less than one washing up bowl full of water to do the job. Although I will admit I would personally find it difficult to imagine using even 50l of water to wash dishes manually in a sink - but I suppose if you washed under running water rather than in a bowl, using that amount that could become feasible.

Not intending to create a debate as to who does it better or vintage vs modern, just pointing out that appliances can use little resources and still do the job very effectively, efficiently and reliably. With the way the world is heading we all need to do what we can, and even if resources are plenty wherever one lives it’s still prudent and respectful to nature not to waste precious resources. What may seem as little contribution on a personal level all adds up to a positive contribution as a greater whole.

Jon


Post# 1212761 , Reply# 48   8/22/2024 at 05:23 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Correct me if I'm wrong, it sounds like there are food bits at the bottom of the dishwasher at the end of the cycle. Without a macerator, the drain pump can only accept food bits up to a certain size- the rest has to be separated out. Whats left sits on top of the grate. Filters should not need cleaning either, it is the job of the dishwashers to be self cleaning for life.

 

 

In the Power Clean filter module unless a person wittingly decides not to scrap whole slices of food or intentionally places large unbreakable chunks of food into the dishwasher, food bits slip through the almost grape sized tub protruding louvers encircling the mechanism where they are then pulled into a beefy 1/3 HP (500 watt plus +++) 3450 rpm macerator and ground up into fine particles. A good portion of the water is then pumped into the filter chamber where the ground food accumulates and settles while water exits out through the fine filter. Holes at the bottom of the wash arm spray downward washing the fine filter squares preventing food soils from clogging them or permanently sticking to them. At drain, the filter chamber is pumped out directly- settled soils can not in any way migrate back into the tub- all accumulated soil in the chamber leaves through the machines drain hose and into the homes plumbing. The soil chamber is huge and can hold a LOT of food soil- soil from the worse cases of food bits stuck to every dish possible. In a EU machine I can just imagine the fine filter becoming totally clogged into the main wash. The Power Clean Filter Module stops just short of an insink garbage disposer. 

 

 

To give you an idea, here is a disassembly of a late model US Power Clean Filter Module. What the vid doesn't do full justice or show how much area volume is inside the soil chamber.

 

 




 

The whole mechanism being changed out in the Kitchen Aid version- I like the big motor and pump size smile

 




 

 

To get this true self cleaning, true none pre-rinsing design to work you're going to need a bit of water to maximize its full potential.

 

 



CLICK HERE TO GO TO chetlaham's LINK

Post# 1212763 , Reply# 49   8/22/2024 at 05:47 (238 days old) by Lavamat_jon (UK)        

Sorry Chet, but you are wrong in your hypothesis - on a correctly operating and used dishwasher, no food bits remain on the filter at the end of the cycle and as mentioned before any remaining food scraps and residue that isn’t dissolved by the detergent is flushed down the drain. I have just taken the filter out of mine before posting to check and there is nothing in the sump or indeed either on the coarse mesh or fine microfilter - and it has been a while since I’ve cleaned it.

If you are putting food bits in that are big enough to clog the drain, then you are using the dishwasher wrong - any large food scraps should be scraped into the bin before you load. It is a dishwasher after all, not a waste disposal unit.

Cleaning a filter is really not as big or ardeous a task as some some think it is on here. It’s a 2 minute (if that) occasional job. It’s no different to maintaining the filters on your dryer, cooker hood, vacuum etc… I don’t understand the whole melodramatic aversion to dishwashers having a filter. If anything, priding on simplicity as you do surely adding a macerator is arguably just an extra unnecessary part?

My parents both being disabled very rarely check or maintain their dishwasher filter as recommended, yet it still yields sparkling results every time. I will clean it when I remember (maybe every 6 months) and other than perhaps a stray bit of plastic wrapping or cocktail stick the filter itself is always clean of any particles of foodstuffs and just requires a rinse under some hot water.

The fact remains that you can wash dishes very efficiently and thoroughly with little water and energy, without needing a whole ocean of water to do so. Of course there are different approaches to doing the same job - just wanting to provide factual views from an alternate viewpoint 😊.
Jon


Post# 1212764 , Reply# 50   8/22/2024 at 07:10 (238 days old) by chetlaham (United States)        
Good cleaning needs up to 16 gallons

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Those dishes have to be going in relatively clean or with relatively little soil load to produce the results you describe. I can't imagine detergent being able to dissolve bigger food bits let along in large quantities.

 

A macerator is a necessary part in every aspect including saving energy. You should not rely on manual clean filters or sump grates- particles need to be ground up, separated, and then flushed down the drain in the same load. Anything less will force loading pre-prep which significantly increases energy use.

 

Perhaps what you see as dishwasher mis-use is actually the right way to use a dishwasher and I could see how you came to that inference when your design might not allow for proper soil handling. You're simply altering your patterns until the machine you're using produces the great cleaning results you want to see. Coming to the conclusion this is normal and acceptable based on the reduction of energy use. It is no secret the the soil soiled dishes are going into a machine the less water is required to clean them inside the machine. 

 

Granted I'm not there as I have not witnessed or experienced what you have experienced. So I could be wrong. At the same time I do know that when Americans including myself switched to tall tubs the results were not the same as their or my Power Clean Module. A friend of mind even had his spray arm tall tub holes clog. 

 

 

Only acceptable luck I've ever had with a tall tub is my former MDB Maytag and currently near identical Maytag MDB7979SHZ0 which is based on the Power Clean Filter Module design. It has a macerator, self cleaning fine filter, and can use up to 16 gallons of water with the right options and soil sensing inputs.

 

 

https://s3.amazonaws.com/sm-backend-production-attachments/instruction-sheet-w11172665a.pdf

 

 

 

 

 

I sure hope you're dishwasher's soil sensor would modify the cycle to 16 gallons of water if the load was dirty enough. Please tell me it can. 

 



CLICK HERE TO GO TO chetlaham's LINK

Post# 1212765 , Reply# 51   8/22/2024 at 07:32 (238 days old) by Maytag85 (Sean A806)        

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While it is possible to use as little resources as possible, it is often poorly executed these days. Seems companies these days just like to GM-ification everything, good idea, good layout, terribly executed.

I’ll put it this way and it may be an apples to oranges comparison, but here it goes. Say for example, you have an old Ford truck from the 1990’s with the 300 inline 6 with a cast iron timing gear, simple proven pushrod OHV design. May not be extremely efficient, but continues to run and run and run forever. Then, you upgrade to a newer Ford truck with the Ecoboost V6 which gets good fuel mileage, but here’s one thing they don’t mention in the fine print. Every so often, the timing chains and phasers and glides have to be replaced, intake valves have to be cleaned since there’s carbon buildup do to the GDI design, among other things. What ends up being saved on fuel costs will be spent on repair costs, it’s all fun and games until something more efficient ends up nickel and diming you in repairs that aren’t repaired on something older. While the old Ford truck from the 1990’s gets mediocre mileage, it’ll continue to run and run with little maintenance, only things it will need is fluid changes.

As the saying goes: “If it’s too good to be true, then it probably is”.


Post# 1212767 , Reply# 52   8/22/2024 at 07:47 (238 days old) by Combo52 (50 Year Repair Tech Beltsville,Md)        
Best cleaning dishwashers

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Hi Chet, I don’t know why you keep going on about power clean dishwashers. They’re not making them any anymore. They’re never going to make them again, everybody knows it was a wonderful dishwasher. I have three of them in my two homes.

As a repair person that deals with people and their appliances every day, one thing is universal. Everybody loves their new dishwashers among my customers. It doesn’t matter whether it’s a Bosch, Maytag KitchenAid, etc. etc. universally very happy with the results of their dishwashers.

There are many testimonials on this site from people who are very critical of dishwashers and yet they love their new machines. Look at the rave reviews on the new Maytag rack how much Bob loves his Bosch dishwasher in Texas Almost everybody says they’ve never had such clean dishes.

The great majority of people in this world want their appliances to use less energy less water and make less noise. Dishwasher manufactures amazing job on these three things machines also continue to be quite durable. you have to remember historically back in the 60s and 70s there were lots of dishwashers that didn’t last five years in the United States and yes, there are dishwashers today that don’t last five years I have thrown away three Samsung dishwashers that were under three years old in the last month, for example.

The KitchenAid dishwashers of old here in the United States from the 50s through the 80s were incredibly well built dishwashers. However, the most frequent service call we got on them was not cleaning well they were all kinds of things would go wrong with them that needed attention. nothing has changed. Modern dishwashers can have problems to.

Reply 51 hi Sean yes you’re definitely getting into apples and oranges when you bring in a 1990s Ford truck into the comparison, however, those engines really didn’t last that long and they made so much pollution and use so much fuel that nobody would even drive them today. When I was working for Domino’s service in 1979, they gave me a brand new Ford van with the 306 cylinder and an automatic transmission, that engine had to be rebuilt because of a failure of one of the cylinders by the time it had 37,000 miles on it things were not that well built in those days, even though it was a rugged engine in principle it really wasn’t that great. And there was no warranty on it like today, the new Pacifica. I just bought has six years and 60,000 mile warranty on it with no extra charge. Manufactures know that things are much better today and they’re willing to give long warranties.

John

Modern cars are easily lasting 100 200 250,000 miles if you take care of them and all the while they’re producing 1/60 of the pollution so it’s really not a bad thing if the vehicle needs to be recycled after 20 years.


Post# 1212770 , Reply# 53   8/22/2024 at 08:37 (238 days old) by Lavamat_jon (UK)        

Even 16 litres is more than enough, 16 gallons is just crazy and wasteful.

You’ve actually seen photographic evidence of what my own, very efficient dishwasher cleans on a daily basis yet still claim it’s impossible or that I’m altering my routine to achieve the results? Where’s the sense in that 😂. Dirty dishes go into the machine, any large loose scraps scraped into the bin, clean dishes come out. Short of dumping the whole contents of the meal into the dishwasher instead of eating it I struggle to comprehend what standards you actually expect to achieve yet alone why you would that much water.

On another thread you say you mostly eat frozen convenience meals. Do you cook from scratch on a daily basis? No shame if you don’t, cooking isn’t for everybody, but I do cook from scratch everyday and the dishwasher copes with any pot, pan, roasting dish etc thrown at it with ease. I’ve yet to put anything back in for a second round. The dishwasher would have a much easier life if we ate convenience food everyday.

Perhaps filters vs macerator is a personal preference, but it is wrong of you to say they don’t work as the fact is they do, and again with (I repeat) very little actual maintenance required.

As another saying goes, you can lead a horse to water but you can’t force it to drink. I will happily continue doing dishes with responsibility and respect to the world’s resources whilst getting great results - whether or not you choose to believe that plenty of people already do that is up to you.

Enjoy your day.

Jon


Post# 1212771 , Reply# 54   8/22/2024 at 08:40 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

So John, why don't you ditch your Power Cleans for a modern tall tub? You claim modern tall tubs clean even better with less water, noise and energy. So why not do the right thing and save the planet? You can even hand your Power Cleans over to me since I don't mind noise, water and less clean dishes. 

 

 

Dishwasher longevity and reliability peaked in 1983 to 1991 especially with the introduction of the GE Perma-Tuff Potscrubber which was the pinnacle of it all.

 

 

Other than those being forced into using modern machines I have no doubt there is a substantial number of folks who like the increase in capacity and quietness tall tubs offer on the premise most of the dishware cleaning is already done beforehand. The inability of tall tubs and manual clean filter system to handle food bits does not make itself known to the user. You have to realize that, tragically, a large number of the population has grown up with dishwashers without fine filters, no or insufficient main wash heating, broken macerators, deliberately shortened main wash times, insufficient water change outs, short cycle times, poor water distribution, no upper wash arm (I'm excluding GE's pop up tower here), no power shower, bargain dish-washing detergents, hard water, undersized detergent cups, or a combination of all these things which has permanently conditioned people to pre wash and pre-prep their dishware to varying yet significant degrees. 

 

Prerinsed dishware isn't going to matter in a tall tub, of course people will see whats next that being reduced noise and the feel good of perceived energy savings deriving hedonic fulfillment from these gains.

 

The Power Clean on the other hand with reasonable time, enough hot water and good detergent will out clean anything being able to provide a true level minimal dish prep. Scrape, load, and wash. You should not even have to pre-treat pots and pans. Load and wash. Water should never touch the vast majority of dishware prior to turning the machine on. The WP PC is capable of doing just that. As all dishwashers should.     

 

 

 

 

 


Post# 1212773 , Reply# 55   8/22/2024 at 09:10 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

@Lavamat: I have no doubt your dishwasher cleaned that bake pan, loaded as is. However, you have an excellent example of soil removal from just one surface, not soil handling and or soil elimination of the machine itself. All that pan does is turn the water red/brown in color. (forgive my cynical nature here)

 

Soil handling and soil elimination comes in three parts:

 

1) being able to load a used salad bowl and cooked on egg in a stainless pan and not have any of the food bits be at the bottom of the machine at the end of the cycle and not have any of it be in the fine filter of the machine.  

 

2) How would your dishwasher adapt or handle every single plate, pan, bowl, dish, cup and utensil looking like that bake pan inside and out under an extreme Bobload condition? Would there be enough water to carry away all that soil? Would there be enough water use and change outs in the cycle such that the final rinse water is crystal clear, clean enough to drink without flavor, minus rinse aid? (forgive my analogy) 

 

3) The ability to stop macerated particles from ending up on surfaces at the end of the cycle. This is where the final filter comes in, and from what I'm seeing both your machine, my machine and a Power Clean module do that with excellence so I think we can all agree on #3 being superb. 

 

I used to cook most of my meals from scratch, but after buying a Sharp R-21LCFS commercial microwave oven experiencing profoundly even cooking without splatter, drying, burning, or temperature gradients at full 1000 watts of output power along with its understandable easy to use nature I became deeply smittened switching over entirely canned, frozen and pre-made meals. The time savings, ease, convince, tasty and congenial outcome has me psychologically addicted.   

 

As of late that is changing primarily because of farmer markets I've started to cook some of my own meals again relying less on my microwave oven.

 

 

 

 

 

 

 


Post# 1212776 , Reply# 56   8/22/2024 at 09:34 (238 days old) by chetlaham (United States)        
My Dishwasher Maytag MDB7979SHZ0

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Here is my dishwasher. On normal without options it uses 3 gallons of water, but on Powerblast with options and food soil it can go well above 9 gallons.

 

 

imgur.com/a/a539ErE...

 

imgur.com/a/UEeirwE...

 

imgur.com/a/7SPWrfG...

 

 

16 gallons is not wasteful at all when its required. Whirlpool seems to think so, and I can understand why. You need water to carry soil away.

 

 

Despite everything it still can not outperform the Power Clean Filter Module but does perform well over all.

 

No filter to clean.

 

 


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Post# 1212778 , Reply# 57   8/22/2024 at 09:47 (238 days old) by Hoover1100 (UK)        
Pardon the intrusion..

But to answer your questions based on my modern, energy and water efficient Miele without a macerator;

"1) being able to load a used salad bowl and cooked on egg in a stainless pan and not have any of the food bits be at the bottom of the machine at the end of the cycle and not have any of it be in the fine filter of the machine"

Yes, my machine manages to do this without leaving any traces of food easily

"2) How would your dishwasher adapt or handle every single plate, pan, bowl, dish, cup and utensil looking like that bake pan inside and out under an extreme Bobload condition? Would there be enough water to carry away all that soil? Would there be enough water use and change outs in the cycle such that the final rinse water is crystal clear, clean enough to drink without flavor, minus rinse aid? (forgive my analogy)"

Again, my machine manages all of the above, results are always spotles, final rinse crystal clear, filter empty and I always cram it full and never pre-rinse a thing.

Not only do I never pre-rinse a thing, I have to admit I'm a bit lazy when it comes to scraping large and solid particles before loading. From what you have described of the kind of particles which would not be removed in this "power clean" dishwasher, it sounds like the only food particles that would be left behind in my machine would also be left behind in the power clean. One difference appears to be that with this power clean design I would then have to reach in and pick these bits out by hand, whereas in my machine on the rare occasion large solid pieces of food are left in the filter I can just lift it up, shake it over the bin and put it back in without having to touch the food particles


Post# 1212780 , Reply# 58   8/22/2024 at 09:59 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Do you have pictures and a model # to your Miele?

 

My Maytag dishwasher has both a macerator and fine filter.

 

I can't picture a machine being able to seriously clean without either. 

 

 

Yes food gobs that are to big to go through the Power Clean louvers have to be picked out by hand but that should be very rare- big bits should be scrapped off. The rest is handled well by the power clean. I can't see many medium sized bits of food that can get into a Power Clean leaving a Miele.


Post# 1212784 , Reply# 59   8/22/2024 at 10:09 (238 days old) by Hoover1100 (UK)        

Yes it's a Miele G 645 SC, not sure of the exact age as I bought it 2nd hand.

I have attached a picture, I would show you inside but it's currently half full of dirty dishes so not a particularly pleasant sight 😅

According to the specs it uses 13L of water per cycle, 17L on a cycle with a pre-rinse is selected, it does 2 rinses on all cycles.


  View Full Size
Post# 1212790 , Reply# 60   8/22/2024 at 10:20 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Post pics of the inside when you can. No offense, I can't see that handling bits of food like a Power Clean. I wish the EU had 230 volt 50Hz power cleans with the space to install them. The dishwasher in post #13, and its latter iterations, should be all over Europe.


Post# 1212792 , Reply# 61   8/22/2024 at 10:33 (238 days old) by Hoover1100 (UK)        
From my (admittedly vague) understanding of the filter

When the machine is washing or rinsing the water is drawn across the filter and any food particles are trapped in the filter and under the high temperature, mechanically softened water and strong alkaline detergent being dragged across it for an extended time at pressure, the vast majority of food is simply dissolved.

When the machine drains, the water is pumped downwards, dragging any food particles remaining off the filter and out down the drain.

Until I can get pictures of my machine, I have attached a picture of the replacement filter for this model.


  View Full Size
Post# 1212793 , Reply# 62   8/22/2024 at 10:42 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Interesting.

 

How many gallons of water for each cycle? Is there a soil sensor? My model has a turbidity sensor that sends light through the water to determine how the cycle should progress. Poor light shine through indicates the need for more water change outs and loner cycle times.

 

 

My motor is an across the line PSC, with food chopper.

 

 

 

 

 

 

 

 

Here is the motor, both wash arms run at the same time including the top sprayer:

 

 


Post# 1212794 , Reply# 63   8/22/2024 at 10:48 (238 days old) by DaveAMKrayoGuy (Oak Park, MI)        

daveamkrayoguy's profile picture

Clean mine, too--and what a difference it makes when I don't have things that have to be rewashed...

 

Put on gloves of course, and have to bear with removing stuff that looks like I just ate often after I just ate (yeeeccchhh!!!!)...

 

So, no, no dishwasher other than some having a built-in scrap grinder designed to pulverize small particles of food, a dishwasher is not a food-waste disposal...

 

Success speaks for itself--and that is mine never gets clogged up and full of water from any of the gunk I really am led to believe a dishwasher is capable of getting off--none really is!!!!

 

I remove my own threatening amounts, and in short, everything gets clean...

 

 

-- Dave


Post# 1212796 , Reply# 64   8/22/2024 at 10:53 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Filters in dishwashers ought to be self cleaning. This is specifically why I bought my Maytag dishwasher. I've never had to clean a filter and I can load dirty.


Post# 1212798 , Reply# 65   8/22/2024 at 10:57 (238 days old) by Hoover1100 (UK)        
As far as I'm aware

There is no soil sensor, it's a pretty entry level model from approx the mid 00's.

13L for a normal wash, 17L with a pre-rinse, according to Google that's 3.4 US Gallons and 4.5 US gallons respectively, a bit high for current European standards but as I say it is an entry level model and potentially around 20 years old. I have used more modern Bosch models which only used about 1.9 US gallons which performed just as well.


Post# 1212800 , Reply# 66   8/22/2024 at 11:04 (238 days old) by Lavamat_jon (UK)        

Chet,

In answer to your questions;

1) Very easily, this is a basic requisite of any dishwasher.

2) That dish was in a fully stacked “Bobload”, loaded alongside saucepans, plates, glassware, teapot, Pyrex jug etc. and a fully loaded cutlery tray. No redeposits on anything. Rinse water is always clear on the one time I’ve bothered to check. Each water fill is 2-3 litres, usually with 4 or 5 water changes depending on the load. Should I want more water, a forced prewash and an extra rinse, I can choose to do so with an option but I never really have the need to. Everyday items without any baked on soiling come clean from the quick cycle (which can be either 58mins or 1:23) with just 3 water changes and 8-9l of water.

3) No particles remain at all on the load at the end of the cycle. I have even dumped the coffee grounds from my bean-to-cup coffee machine, and asides from one or two tiny grounds there was no evidence of coffee. I would count that as a success.

All with minimal amounts of water, but enough to do the jobs. Pretty much any decent modern European dishwasher can achieve this.

It sounds like we agree on what needs to be scraped off, so I don’t see your earlier point of any excessive pre-prep that supposedly has to be done before loading a filter based dishwasher. The detergents dissolve most food particles which are flushed down the drain when the machine pumps out.

I can understand your scepticism if you’ve never had any direct experience, and you’re right to question anything you personally can’t understand and find difficult to believe. I cant comment on the US dishwashers as I have never used one but all I can do is testify to how well our filter based dishwashers work here, with as little energy/water as possible. And I’m sure you will agree that if something can be done to a high standard in the least wasteful way possible, that is only a positive thing for the world.

On a different subject, for the sake of your health I would look at moving away from all that awful processed food in your diet, it’s not good for you.

Jon


Post# 1212802 , Reply# 67   8/22/2024 at 11:10 (238 days old) by Maytag85 (Sean A806)        
Reply #52

maytag85's profile picture
I believe the Ford 306 was a completely different engine than the 300 inline 6.

The 300 inline 6 started out life as the 240 inline 6 when it debuted in 1965, sometime in the 70’s the displacement was increased to 300 ci. Was such an indestructible engine, was even used for marine applications such as industrial generator engines, water pump engines etc.

During the cash for clunkers program in 2009, they drained the oil out of many 300 inline sixes to kill them off, literally kept on running without any oil for several minutes, several attempts later, still kept running, they eventually gave up on trying to kill them off.

Maybe I should create a thread in the Super forum index in the future about the longest running engines of all time.


Post# 1212804 , Reply# 68   8/22/2024 at 11:19 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

I'd really like to try your machines out with your detergent and your softened water. Its possible they may actually achieve great results with true prep-less loading. Being honest I am skeptical as your machines are different from anything I've known to achieve great results. So I'll remain humble on this one, its only fair and logical thing to do. I am not about ego, but rather performance so I'll take your word albeit still be skeptical on my part.

 

There are two things however we may have to disagree on potentially:

 

How water and energy are used is trivial in terms of production. There are forums of energy which are essentially free and so abundant they make end use conservation irrelevant. With our modern production of water and energy the impact conservation makes is almost non existent. I don't want to derail this thread so I will leave it at that.  

 

Looking at the wiring, programming and construction of EU machines makes them more complicated than many US machines, especially older US machines. Complexity only creates longevity and serviceability problems for the end user even if it saves a lot of energy.

 

   


Post# 1212805 , Reply# 69   8/22/2024 at 11:38 (238 days old) by Combo52 (50 Year Repair Tech Beltsville,Md)        

combo52's profile picture
Hi Sean, Correction, in reply #52 it should have said 300 CI 6 cylinder engine I don't think there was ever a 306 CI engine

John


Post# 1212813 , Reply# 70   8/22/2024 at 13:56 (238 days old) by maytaga806 (Howell, Michigan)        

Chet, we have the same Maytag dishwasher. It’s become my favorite modern dishwasher out of all the machines I’ve used. Absolutely fantastic dishwasher, I’ve never had one dish come out dirty after a cycle, for a modern machine it’s got some good power to it, the results achieved by this machine is no different than my 2006 Powerclean, cleans just as well which I was actually very surprised by but I think this has to do with the size of the motor it has which is nothing like the power cleans of course but from my understanding is still bigger than most modern dishwashers.

There are two strainers in the sump that do need regular cleaning I do ours twice a year. It’s important not to get food bits into this machine, a con compared to a Powerclean for sure but it’s a remarkably awesome dishwasher for something newer and way better than the previous point voyager generation. This was Whirlpools last good dishwasher they made as far as I’m concerned besides the base model with a plastic interior. Be grateful you have that Maytag, it’s one of a kind that didn’t last very long and it was highly under rated.


Post# 1212814 , Reply# 71   8/22/2024 at 14:33 (238 days old) by chetlaham (United States)        

chetlaham's profile picture

Out of all the the tall tub dishwashers I've researched and owned the Maytag MDB series is by far the best I've ever used. By far. The cycle will adapt significantly to soil adding water, change outs, purges, time and heat as needed. No stinginess. The motor labelled 0.18 HP, small, but still more powerful than most modern tall tubs. There is a soft food chopper that grinds thing well. And of course excellent fine filtration. It is the best tall tub dishwasher Whirlpool has ever made and then some.

 

  www.repairclinic.com/Part...

 

www.repairclinic.com/PartDetail/...

 

 

Can you quote the manual I posted or show me what two filters need cleaning? I've never cleaned anything. The metal shield is crimped in place. My understanding is you are not supposed to touch the mechanism as its 100% self cleaning. No smells or stink either.

 

Overall I am happy with my Maytag, it is the second best thing next to a Power Clean Module and I'm not taking anything for granted as time has taught me. My biggest mistake was leaving the Power Clean behind at the old place. Dumb, because even back in the 2000s I had an understanding of what dishwashers were good and what weren't. By the time I wised up and went looking to buy a new Power Clean they were already out of production.


Post# 1212816 , Reply# 72   8/22/2024 at 14:40 (238 days old) by chetlaham (United States)        
Just to Add

chetlaham's profile picture

This is my second Maytag MDB, the first one I had a while back was even quieter than this one had the silk gliding rail which Whirlpool has since discontinued. The plastic retainers began failing and the that ball bearings began popping out falling into the sump and eventually the macerator where they would make noise. Eventually the rail broke apart and the top rack kept falling into the lower rack. I had to rip tie the broken rail in place rendering the top rack unusable. That and the amount of ball bearings the pump had swallowed (at least three dozen) drove me to buy a near identical machine new but without the satin glide racks. The new model has a long heated dry option which is great.


Post# 1212838 , Reply# 73   8/22/2024 at 22:10 (238 days old) by maytaga806 (Howell, Michigan)        

Yes I’ll just give you a video of it as that’ll be easier than explaining. Even though it’s a self cleaning sump, sometimes depending on how you load dishes in soil wise it may need cleaning. Broken glass can get down into this as well which has happened with ours.




?si=nI5C064GqNk1cBtT

I fully agree! It’s my next favorite to a Powerclean but the only modern dishwasher I like. It was perfectly designed, very sleek yet durable & simple and provides the best of the best performance. Beautiful machines. It was too short lived. Your new model is absolutely gorgeous. I was looking for a top control for my family’s home but scored a front control instead that was about a year and a half old when we got it. 2019 model.


  Photos...       <              >      Photo 1 of 4         View Full Size
Post# 1212862 , Reply# 74   8/23/2024 at 04:47 (237 days old) by chetlaham (United States)        

chetlaham's profile picture

Thanks for the compliment! smile

 

Ah, OK, I see now what you're doing. Yes the module can be taken apart if something gets inside or becomes cruddy.

 

 

Personally I've never cleaned the power module. I just load, use one or two Cascade Platinum plus pods one in the main detergent drawer and one in the silverware basket for cooked on loads/cruddy loads. Great results.

 

 

Keep your dishwashers in service as long as you can. This is probably the second best dishwasher ever produced in existence. It is reasonably durable, sturdy, tough racks, flexible loading, great scrubbing, soil handling, quiet, long heated dry and the turbidity sensor will add as much heat and water as reasonably needed to get the load spotless. 

 

I don't know why folks here are showing show much disapproval over water consumption. Yes this machine can get a load of fully pre-rinsed dishes clean with only 3 gallons of water. However when you load batter, grease and mashed potato caked on loads along with week old plates the extra water change outs make all the difference in the world.

 

On other thing worth mentioning. I don't use rinse-aid. Despite this glasses dry streak and spot free. This dishwasher is definitely Whirlpools top 10 best products. 


Post# 1212871 , Reply# 75   8/23/2024 at 10:15 (237 days old) by DADoES (TX, U.S. of A.)        

dadoes's profile picture
 
I'm always befuddled at how much presumably-edible food some people apparently are tossing away into their dishwashers.


Post# 1212881 , Reply# 76   8/23/2024 at 12:48 (237 days old) by chetlaham (United States)        

This post has been removed by the member who posted it.



Post# 1212882 , Reply# 77   8/23/2024 at 12:53 (237 days old) by chetlaham (United States)        

chetlaham's profile picture

@Dadoes: I think we will have to agree to disagree. The edible food being "tossed" in is how dishes are supposed to be prepped- very minimally. Bowls, pans, saucers, ect will always have bits food stuck to them- sometimes more than others depending on the sauce or how clingy the food bits are. It is not practical to remove every piece unless you want to waste time, water or both.  

 

The comments on the video in post #73 describe a common problem encountered by Americans- grunge build-up due to insufficient food particle management in modern dishwashers.

 

 

Before anyone say this is only the result of dishwasher misuse I encourage you to read Post# 941638 in this thread:

 

www.automaticwasher.org/c...

 

We know how John loads his dishwashers. Unlike most Americans John had the option of going back to a dishwasher that actually works. Other Americans don't have that option tiring of the constant smells/grunge/cleaning/service calls and just switch to pre-rinsing dishes wasting on orders of magnitude more water than any dishwasher has ever used.

 


  View Full Size
Post# 1212893 , Reply# 78   8/23/2024 at 14:47 (237 days old) by maytaga806 (Howell, Michigan)        

Due to these modern dishwashers being tall tubs they don’t have the same amount of room to have these big self cleaning modules that actually seperate soils and flush them during draining. There’s a metal screen over the food chopper on the MDB series that sits directly outside of the motor, in order to access it you have to flip the machine upside down. Anyway the chopper screen can get plugged if your not careful and load lots of food chunks into the machine and in this video I saw of how to fix this issue the guy said his dishwasher wasn’t cleaning well anymore and it was because of a plugged food chopper screen. It was so disgusting I’ve never seen anything like it. It’s so important not to load any foot bits into modern machines that have these so called self cleaning filters because in reality they are not that, unfortunately food gets stuck in that screen and plugs water flow overtime the worse and more plugged that screen gets. But if your careful while loading this should never be a problem. This is my only issue with this machine but it’s no big deal to me and everytime I clean those two strainers out under the lower wash arm of the sump it’s usually very clean but I always want to ensure water can flow smoothly for the best of performance. We ever so slightly rinse dishes that have hunks of food on them to prevent anything from clogging that screen.

Chet do you have issues with your dispenser getting flooded during the pre rinse? If we use pacs they are almost totally dissolved by the end of the pre rinse, making it pointless when it comes to the main wash and all the detergent has already been dissolved and leaked into the pre rinse waters. Doesn’t seem to be as much of a thing when we use gel, we use the cascade complete blue gel which works excellent in our water at this particular house on top of rinse aid set at the third setting. Anymore rinse aid than that will cause a suds lock! This dispenser for some reason is not sealed well at all.


Post# 1212896 , Reply# 79   8/23/2024 at 15:41 (237 days old) by CHETLAHAM (United States)        

chetlaham's profile picture

@Maytaga806: Yes, I have the same issue. The dispenser is completely filled with water and the detergent tab is fully dissolved. There are even suds in the pre-rinse water. Sadly I've used many dishwashers where the dispenser becomes completely filled with water including latter model GE.

 

Whirlpool standard tubs got it right, they had a seal all the way around the main detergent lid, and the latch would force the lid to stay firmly down.

 

 


Post# 1212899 , Reply# 80   8/23/2024 at 16:20 (237 days old) by maytaga806 (Howell, Michigan)        

I know right? My portable Powerclean doesn’t even get a hint of moisture during the pre wash in the closed cup, keeps it nicely in tact til it’s time to pop open. Glad we’re not the only ones.

Post# 1212901 , Reply# 81   8/23/2024 at 16:41 (237 days old) by neptunebob (Pittsburgh, PA)        
But if you use a good detergent and hot enough water..

neptunebob's profile picture

Most of the problems everyone refers to here will not exist.  

 

My MIL is 89 and lives alone in her family house and years ago had a very expensive KitchenAid dishwasher installed there.  It did have the porcelain tub so must have been soon after the Whirlpool takeover.  

 

Recently my sister and her husband went to her house and found the dishwasher stunk of high heaven.  Some of the other neighbors came over and took the machine apart and cleaned the filters and they were all full of gross gunk.  How did it get that way?

 

My sister asked "Alice" where she kept the Cascade or Finish and she didn't know, it turns out Alice ran the machine without detergent at all. 

 

Her water heater was also turned down so that it was barely warm enough for a shower.  

 

She stocked Alice up with paper plates and utensils, bought some detergent and turned up the water heater some (telling Alice she did that and be careful), hopefully the odors will not come back.

 

Oh, and Alice did pre rinse (It seems like mostly women do this) using a lot of water and since she is on septic there were wet spots in the back yard.  


Post# 1212904 , Reply# 82   8/23/2024 at 16:57 (237 days old) by chetlaham (United States)        

chetlaham's profile picture

You're not the only one. Modern dishwasher detergent dispensers suck.

 

The Power Clean could hold you through a pre wash thermal hold, and then dispense nice, fresh detergent for the main wash. A true marvel. The Power Clean was a perfected design in almost every way possible, a timeless classic. It could have easily stayed in production for decades more. If everyone was like me the Power Clean would in 95% of all Kitchens with Hobart Kitchen Aid type construction. Available in Polymer, Stainless Steal and Porcelain on Steal from BOLs all the way up to TOL models. Single cycle dispenser-less entry level machines all the way up to deluxe multi cycle LCD control tri dispenser multi orbital wash arm models and everything in between. Indestructible metal screw on drain check valve assembly. The module and motor would be a regularly replaceable item stocked in stores and online- as common as the direct drive motor coupler. Molex plug wire harness such that different timers, cycle fascias, escutcheons, ect can be adapted to almost any machine. 

 

The world would simply stop prewashing dishes and at 11 gallons of water per cycle on average water consumption would drop dramatically compared to modern tall tubs.


Post# 1212950 , Reply# 83   8/24/2024 at 00:53 (237 days old) by neptunebob (Pittsburgh, PA)        
But Chet...

neptunebob's profile picture

What would you have done if you were faced with our "Alice situation"?


Post# 1212965 , Reply# 84   8/24/2024 at 09:35 (236 days old) by chetlaham (United States)        

chetlaham's profile picture

Forgive my ignorance, but what are you referring to as an Alice Situation?


Post# 1212969 , Reply# 85   8/24/2024 at 10:38 (236 days old) by cfz2882 (Belle Fourche,SD)        
alice situation

no detergent and insufficient water temp :)

Post# 1212972 , Reply# 86   8/24/2024 at 10:55 (236 days old) by chetlaham (United States)        

chetlaham's profile picture

Turn up the temp and instruct the use of lots of detergent. I don't know how well generous detergent dosing would work for a year, so I might have to clean the sump and pump out. 


Post# 1212974 , Reply# 87   8/24/2024 at 11:02 (236 days old) by DADoES (TX, U.S. of A.)        

dadoes's profile picture
 
chetlaham:  Forgive my ignorance, but what are you referring to as an Alice Situation?
See Reply# 81 above.


Post# 1213014 , Reply# 88   8/25/2024 at 00:09 (236 days old) by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
to chetlaham

Modern dishwashers seem to have weak sprays, forcing them to run longer. In addition, dishwasher detergents and rinse aids have fragrance because food tends to stink up the dishwasher. My Bosch/Kenmore will smell like whatever food I've eaten, from blueberry pancakes and coffee to shrimp Alfredo casserole. Finish ultimate takes care of that.

Post# 1213029 , Reply# 89   8/25/2024 at 08:15 (235 days old) by chetlaham (United States)        

chetlaham's profile picture

Jerome, your observations are correct. To wash dishes you need four things:

 

1) Mechanical energy

 

2) Chemical energy

 

3) Thermal energy

 

4) Time

 

When one or more of these are reduced others must be increased to compensate. Exception for enzymes which work in stages over time. This is why modern dishwashers spend so much time washing and rinsing to compensate for weak low pressure, low volume sprays and low thermal hold satisfaction points.

 

Modern dishwashers simply do not use enough water, and do not have the macerators, filters or large enough pumps to properly capture, grind, collect and carry away food soils. Soils accumulate within the internal parts of the machine accumulating and begining to smell over time. Modern dishwashers are not practical or capable in residential applications. 

 

 

People did not know what they had with the Power Clean Filter module and Maytag Jetclean. Even commercial dish machines with motors 1HP and over are not meant to handle un-preped dishes as food bits just accumulate on top of the sump strainer.  Commercial machines are meant to be used for fine cleaning and sanitation. 

 

 

https://www.jacksonwws.com/wp-content/uploads/2016/12/DishStar-LT-Operation-Guide.pdf

 

 

 

Unlike a restaurant, residential users typically have the luxury of waiting an hour for their machines to complete a cycle- enough time for a machine to do pre-rinsing, scouring, coarse cleaning, soil roundup, automatic filter cleaning in addition to fine cleaning and sanitation. There is no reason why users must complete 5 steps prior to turning on their machines in order to have civilized results- ie not having stink over time.   


Post# 1223984 , Reply# 90   2/9/2025 at 19:06 by GELaundry4ever (Nacogdoches, TX, USA (considering moving to Temple, Texas))        
Speed Queen Dishwashers

Perhaps Speed Queen Dishwashers can use these enormous pumps for power, efficiency and effectiveness.

Post# 1223992 , Reply# 91   2/9/2025 at 20:21 by chetlaham (United States)        

chetlaham's profile picture

Oh, what a dream come true that would be!



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