Thread Number: 80994  /  Tag: Modern Dishwashers
BOSCH 800 Series throwing error code E:09
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Post# 1049926   11/4/2019 at 15:05 (1,578 days old) by chachp (North Little Rock, AR)        

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So disappointed.....After only 18 months our Bosch dishwasher is throwing an error code indicating the heating element or heat pump is not working.  The error indicates the water is not reaching full temperature and the dishes are really wet at the end of the cycle.


Online is says it could be because I'm not using the dishwasher correctly.  So WTF is that supposed to mean?  I dirty dishes, I put them in, I put soap in and press the button. What the XXXX am I doing wrong?  LOL.


They are coming out tomorrow we'll see how that goes.  Luckly I have a home warranty or this wouldn't be covered and I would be really pissed after such a short time.

Post# 1049937 , Reply# 1   11/4/2019 at 16:03 (1,578 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        
Yeah that sucks

Heared of some people over here having that issue over and over again, on the other hand some people have never had any issue.

Have yet to find a pattern in that.

If it is a series 800 it should have a water softener, right?
Assuming that is set right and you don't use the sudsiest detergent I don't see any user error.

Luckily (if you can talk about that in that situation) the part is just a little over 90$ from Bosch directly (perhaps you could find it cheaper elsewhere) and not to complicated to replace.

Videos suggest either taking the whole bottom off (which seems super stupid compared to option 2) or just taking off the side panel and removing the main control, then you can just work from their though space is a little tighter.

Not sure if option 2 would work on the ChristalDry (Zeolith) models too, but don't see why it wouldn't.


I stand corrected, on the Zeolith (or CrystalDry for the US) machines you do have to remove the bottom to get acess to the pump as ot appears the clearances are to small as there is an airduct going from the fan to the Zeolith container.

This post was last edited 11/04/2019 at 16:19
Post# 1049982 , Reply# 2   11/5/2019 at 01:49 (1,577 days old) by chachp (North Little Rock, AR)        
Sudsiest water..

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This model does not have the water softener.  We didn't get that model because we have a whole house water softener system.  Your comment about the sudsiest water makes me wonder if that could have something to do with it.  I use a Cascade pod in the main wash and a little bit of Cascade Powder in the pre wash.  Maybe a tablespoon or so.  I've never seen any sudsing in the bottom of the machine.


Is it possible the Cascade pods are too much given I have soft water?  Could they be designed for harder water and should I be using only powder to better control the amount of soap?


We have a home warranty that covers the repair for the cost of a copay so I'll let them deal with it.  I did see the YouTube video where they replace it from the side.  While I have little fear working on vintage machines this looks like I could easily mess something up so I'll let them do it.  As much as I like this dishwasher if this becomes a recurring issue she's out the door.

Post# 1049990 , Reply# 3   11/5/2019 at 03:55 (1,577 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        
Detergent in the prewash?

There's really no need for that.

Don't think it makes much of a difference fault wise, but I don't think you need that especially since this model should do soil sensing and you could end up without a prewash.

Post# 1050047 , Reply# 4   11/5/2019 at 19:42 (1,577 days old) by combo52 (50 Year Repair Tech Beltsville,Md)        
18 month old Bosch DW throwing Failure code

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Be very careful with a home warranty company unless they are sending out an authorized Bosch service company, some parts of your DW are still covered by Bosch.


Home warranty companies have the worst techs working for them, a major consumer group here in Washington DC did a major report on HWCs and not a single service company that works with them was better than average with most being at the bottom of ratings.


Who ever shows up to look at this problem should be equipped with service information from Bosch and or a lap-top that can directly get such information from Bosch.


This is a complicated and often troublesome DW and it needs proper repairs if it is to last very long.


You should also check with your credit card company if this DW was purchased with a CC, as many CC companies will double the manufactures warranty period.


It is always a good to put at least some detergent in the first water change to help emulsify the food soils, this is the direst water change in a DWs cycle and it is asking for problems to skip the detergent.


John L.

Post# 1050101 , Reply# 5   11/6/2019 at 15:15 (1,576 days old) by Rolls_rapide (.)        

"It is always a good to put at least some detergent in the first water change to help emulsify the food soils, this is the dirtiest water change in a DWs cycle and it is asking for problems to skip the detergent."

Not necessarily... It depends on EXACTLY how dirty the dishes are.

If, for instance, you rinse them under a tap before you load, AND use a pod, AND put detergent in the prewash, it can lead to oversudsing, and probably the heater element being insulated by the suds, overheating, the thermal cut-out operating repeatedly and probably eventual burn-out too.

In my experience P&G dishwasher detergents do foam up.

Post# 1050104 , Reply# 6   11/6/2019 at 16:02 (1,576 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        

Really dunno, but prewash detergent has been obsolete for at least a decade now over here.

Even Miele removed their prewash detergent cup mention in theur manuals if I remember correctly.

No wonder it is usually called prerinse anyway.

The idea is to flush of any soil that just sits there and drain it away, not to actually wash.

Our Bosch does do the longest prewash I know of on any DW on the Auto cycle (mainly because of how the Zeolith system has to be integrated into the cycle) and at 25min and a max temp of maybe 100F, that wouldn't do much, even with detergent.

An even shorter and likely cooler prerinse would do even less.

Post# 1050107 , Reply# 7   11/6/2019 at 16:31 (1,576 days old) by jerrod6 (Southeastern Pennsylvania)        

I don't have a Bosch DW, but a Miele from 2006 that uses about 1.06 gallons each fill, does 4 fills, a cycle, and has a water softener. I sometimes use a bit of powdered detergent in a load if it is heavily soiled, but for normal soil, I skip doing this. Cascade Pods create a sudsy situation in the DW, so I avoid using them. The machine still runs OK, but I am uncomfortable with so many suds when other detergents clean perfectly without them. Perhaps try another detergent brand and see if that helps.

Post# 1050387 , Reply# 8   11/9/2019 at 08:08 (1,573 days old) by chachp (North Little Rock, AR)        
Some advice...

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So here are my assumptions:

  1. Stay away from Cascade pods as they suds too much.  I haven't noticed this in mine but I haven't really looked either.  I usually just start it and walk away.  I did read though that sudsing could have caused the failure in the heat pump on this machine because it could have been starved for water and burned out.
  2. Bosch recommends Finish but doesn't really say powder or pods.  I have read to stay away from Gels because there are two ingredients in Powder and Tabs that cannot coexist in liquid form so Gel only has one.  I think what is missing is the oxygen bleach but I don't remember.  I'm on information overload at the moment.
  3. We have mechanically softened water and from what I've read I should be using half the detergent in anything.  I do in the wash but have been using the pods in the dishwasher.  Should I assume that any pod or tablet would be too much detergent with our soft water and just stick with Powder so I can control the amount?

Has anyone else gone away from the pods because of soft water and if so, which brands?  So many questions, I don't want to burn out another heat pump if I can avoid it.  

Post# 1050485 , Reply# 9   11/10/2019 at 05:04 (1,572 days old) by foraloysius (Leeuwarden, Friesland, the Netherlands)        

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I use a bit of powder in the pre-rinse. It does make a difference on the loads I do. I don't pre-rinse, only scrape. And I use the dishwasher only once in 2-3 days. Without a little extra powder things get clean alright, but when I add it, there is a noticeable difference. It's clean vs clean+.

I use Sun products at the moment, made by Unilever. Tabs for the mainwash and a little powder for the pre-rinse.

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Post# 1050491 , Reply# 10   11/10/2019 at 07:20 (1,572 days old) by chachp (North Little Rock, AR)        

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Thanks Louis.  I started using a little extra powder for a pre wash at John L.'s suggestion a few months ago and I, too, notice a difference especially in how often I have to clean that filter.  I also noticed that I can use the Speed60 cycle with the Extra Dry button and get really good results while cutting an hour off the cycle time.

Post# 1050516 , Reply# 11   11/10/2019 at 11:55 (1,572 days old) by henene4 (Heidenheim a.d. Brenz (Germany))        

As far as I am aware, Speed60 does not run a prewash.

If I'm not mistaken...

Post# 1050520 , Reply# 12   11/10/2019 at 12:37 (1,572 days old) by chachp (North Little Rock, AR)        
I didn't know that....

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Where have you found the actual cycle descriptions for these machines?  Everywhere I look I find what the cycle is, when to use it but not the actual breakdown of the cycle.  

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