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Thread Number: 92054
/ Tag: Modern Dryers
brand new Bosch Home Professional tumble dryer made weird knocking noises. What was the problem ? |
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| Post# 1166077 , Reply# 1 12/9/2022 at 13:09 (771 days old) by cfz2882 (Belle Fourche,SD) | ||
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keep the Bosch probably the wheels the drum rolls on became temporarily "flat-spotted" the same thing happened to my ~2010 Asko dryer:the wheels started knocking,knocked for a few weeks,then stopped and hasn't knocked in years :) Welcome BTW,you live in an interesting and wonderful country :) | ||
| Post# 1166159 , Reply# 4 12/10/2022 at 07:04 (770 days old) by wholelottared (Turkey) | ||
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Are there any other ideas from other people too? Not all of my questions are answered yet haha | ||
Post# 1166180 , Reply# 5 12/10/2022 at 12:45 (770 days old) by Logixx  (Germany) |
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1) Definitely not normal. My Serie|8 is two years old now and does not make that sound. Never did. It will make the quick thumbing sound right after starting, which comes from the drum roller. But that sounds very different from what you have.
3) It's technically equally efficient on all cycles, as the heat-pump is either on or off (until the (re-) launch of inverter compressors next year). I would imagine that the hot Quick|Mix cycle is maybe a little more efficient, as the dryer uses all the heat it generates to dry clothes quicker, rather than starting to vent "excess" heat through the bottom right. Kind of silly, when you think about it. It's like opening your windows at home when it's too hot, instead of turning the heat down. So much for energy efficiency. 4) I, too, was trying to find out how there's 59dB models. However, the exploded views of these are the same - so it's not like there's more insulation in the quieter models. 🤷🏻♂️ 5) Yeah, the two extra filters mean more maintenance. I'd only bother if you see significant lint of the condenser. | ||
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Post# 1166194 , Reply# 7 12/10/2022 at 14:12 (770 days old) by Logixx (Germany) |
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Inverter heat-pumps can change the speed they are running at. Previous TOL BSH dryers used to have ecoPerfect and speedPerfect options to either de- or increase the speed and thus heat output of the heat-pump. These new dryers will will only have the speed option, which will naturally be promoted as something brand new (just like the fact that their dryers are reversing... again).
On the current range, yemp is only controlled via the little fan in the base of the dryer. To (theoretically) prevent high temps, the fan sucks air through the cabinet and removes some heat from the dryer. It's not like on their vented/condenser dryers, where the element would run at full/half/half intermittent power to achieve different temps. I will say that these dryers can get pretty hot. Both MrLaundry101 and I have posted temps to our YouTube Community Tabs, with some instances of over 70C during drying. Essentially, the longer the dryer runs, the hotter it gets. The small fan doesn't do all that much and the Low Temp button doesn't do a thing at all. MrLaundry101 has more dryers in his collection and none got as crispy as the Bosch *can* get. | ||
| Post# 1166198 , Reply# 9 12/10/2022 at 14:58 (770 days old) by wholelottared (Turkey) | ||
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Just realized I made some typos in my latest post and I can't edit it, sorry for that. | ||
| Post# 1166207 , Reply# 11 12/10/2022 at 16:45 (770 days old) by Maytag85 (Sean A806) | ||
I am not sure what’s causing the knocking/thumping sound but my educated guess is it’s either the rollers have flat spots on them or the drum itself is out of round. Have a friend in Michigan who had a Whirlpool 29” top filter dryer from 2009 that made a thumping sound every time the drum went around, that dryer has since been replaced with a older Whirlpool dryer from 1965 that’s been working flawlessly since 2018.
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| Post# 1166240 , Reply# 12 12/11/2022 at 01:37 (769 days old) by wholelottared (Turkey) | ||
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@Logixx , I promise this is my last question lol. So is it true that Mix gets more hot compared to Cottons? I don't have a thermometer so I can't be sure myself. | ||
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Post# 1166249 , Reply# 13 12/11/2022 at 07:27 (769 days old) by Logixx (Germany) |
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My go-to cycle is Cottons Cupboard with +1 dryness, since I also find that the standard setting leaves things just a little damp (probably one of many ways to get the A+++ rating).
I can't say for sure that Quick|Mix always runs hotter; the app certainly says it's meant for items not sensitive to higher temps. I ran a load of shirts through that cycle (again on Cupboard +1) and they got up to a temp of 50° (I did check with a forehead thermometer that can also read surface temperatures). A medium load of heavy cottons on Cotton Extra Dry also reached 50°, while towels using the towels cycle (default settings) reached 65°C. There seems to be not real target temp with these dryers. The AEG/Electrolux dryers are nice. One thing I'd wish is for them to have a filter in front of the condenser, though. | ||
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Post# 1166250 , Reply# 14 12/11/2022 at 07:36 (769 days old) by Logixx (Germany) |
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My Mix cycle certainly does not use the fan. One time, as I was drying a large load of towels using this cycle, it got to the point where condensation started to leak from the dryer. Obviously because that little exhaust fan wasn't running.
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| Post# 1166265 , Reply# 20 12/11/2022 at 11:51 (769 days old) by Maytag85 (Sean A806) | ||
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Reply #19
All dryer designs have their Achilles heel, sometimes it has to do with the way it’s programmed or the mechanical layout/design. Condenser dryers don’t need a vent but the condenser needs to be cleaned out from time to time or else the efficiency will be choked down. Heat pump dryers are similar to condenser dryers in the way they work but have a refrigeration system in place of the condenser and if there’s a leak in the refrigeration system, it simply will stop working and will have to have someone who’s licensed to work on a refrigeration system due to the complexity. Vented dryers electric and gas aren’t nearly as complex as condenser and heat pump but need a vent to exhaust the warm moist air to the outside and are a bit more expensive to operate but depends on the area you are in. Vented dryers need to have the venting/ductwork cleaned from time to time along with the inside of the dryer itself for optimum efficiency and reliability. Only things that really fail on vented dryers are thermostats, heating elements, and on gas versions it’s the gas valve coils, igniter, flame sensor.
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Post# 1166276 , Reply# 22 12/11/2022 at 12:48 (769 days old) by Logixx (Germany) |
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I think Miele has a 120 liter drum, AEG is 118 (I think) and Bosch is 112.
As Lucas pointed out: Easy-Care won't dry. Didn't dry fully on my old Siemens condenser, either. I guess you're better or equally well off just using Cottons without +1. Also: yeah, I think the Duvet cycle is just a timed 3 hrs. program. One thing I will say is that I have not had major issues with tangling in the Bosch. My neighbor has a 55cm deep Beko that reverses and it's horrible at tangling things. There are a bunch of reversing models here in Germany, now. All of them middle-of-the-line. If I had to buy a dryer now, I'd probably go for Beko and then I'd purchase the bottom filter separately. At least that way I didn't spend too much money when it breaks. Miele would just be too expensive, if I really went for the "cool" features I'd like (and probably never use 😉). The Bosch dryer certainly does get the job done and I haven't had any shrinkage yet... it's just not what I've come to expect having used their washers and dishwashers. | ||
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Post# 1166284 , Reply# 25 12/11/2022 at 13:41 (769 days old) by Logixx (Germany) |
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Miele = 120 liters | ||
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Post# 1166286 , Reply# 26 12/11/2022 at 13:43 (769 days old) by foraloysius (Leeuwarden, Friesland, the Netherlands) |
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Condenser dryers and heat pump dryers always leave the laundry a bit wet. That's due to the closed system. Most of the time after a few minutes the laundry feels dry. Selecting a higher dryness level may help a bit. I experienced it both with my Miele condenser dryer and the Siemens heat pump dryer I now have.
Tangling bed linens was an issue with my reversing Miele and is also an issue with the Siemens I have now. I guess putting two duvet covers, two pillow covers and two stretch fitted sheets in together doesn't help. I usually dry the load partly in the dryer and then hang the bed linens up to dry. Makes a big difference in regard to wrinkling too. The temperature inside a heat pump dryer is way lower than in a vented or condenser dryer. Even on the normal temperature setting, shrinking should not be an issue. | ||
| Post# 1166287 , Reply# 27 12/11/2022 at 13:44 (769 days old) by wholelottared (Turkey) | ||
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Reply to #25 Damn I'm surprised then, maybe their door is smaller and that's why it made me feel they have a smaller drum. Or as I said maybe they're more depth-focused. | ||
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Post# 1166297 , Reply# 30 12/11/2022 at 14:53 (769 days old) by foraloysius (Leeuwarden, Friesland, the Netherlands) |
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The condenser is not removable, so hard to tell. It looks clean as far as I can see. Under the condenser is a thin layer of blue lint, a bit sticky/wet. It is easy to remove. Usually it was clean under there too. I will keep an eye on it.
The Auto Clean system looks more desirable, but that wasn't available yet when I bought my set (2018). | ||
| Post# 1166299 , Reply# 31 12/11/2022 at 15:08 (769 days old) by wholelottared (Turkey) | ||
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Reply to #29 @Moon1234 , to be honest, I saw the videos of ticking Miele's and they were sounding even louder than my faulty device. Here are some example videos, check the comments too: Video 1: Video 2: Video 3: Video 4: CLICK HERE TO GO TO wholelottared's LINK | ||
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Post# 1166319 , Reply# 33 12/11/2022 at 16:12 (769 days old) by Lavamat_jon (UK) |
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Some pictures of the filter system on the T1. One feature I forgot to mention and that I use a lot too is steam smoothing - it’s great for shirts, just hang dry afterwards and has meant my iron has not been used now for years :-) Jon | ||
| Post# 1166449 , Reply# 39 12/13/2022 at 03:36 (767 days old) by wholelottared (Turkey) | ||
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My exchanged device came Hey y'all, the exchanged device finally arrived and it's not making the same noise. The first one wasn't doing it too but appeared after like 2 weeks. Let's hope this one will be normal and won't develop any noises 🙏🏻 | ||
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Post# 1166494 , Reply# 40 12/13/2022 at 18:13 (767 days old) by Logixx (Germany) |
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Post# 1166522 , Reply# 42 12/14/2022 at 03:04 (766 days old) by Logixx (Germany) |
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I received an update notification both via the app and on the dryer's display. I have no idea what the software update was about, as I didn't notice any changes. There is another YouTuber who had two or three cycles added to his dishwasher.
The Home Connect app gets frequent updates - usually making things worse, until errors eventually get sorted out. I did try the Mix +1 cycle the other day and had to cancel it after about an hour because there was condensation leaking from the dryer - just like last time when I dried a large load using the cycle. I eventually had to use Timed Dry because every other sensor cycle I tried would shut off almost immediately, even though the clothes were still damp. The 40 min. timed cycle with Low Heat ended up reaching 69.8°C. More on that after I get back from work. | ||
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Post# 1166607 , Reply# 44 12/15/2022 at 06:06 (765 days old) by Logixx (Germany) |
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What I wanted to see is how hot the Mix +1 cycle would get with a larger load. I had one fitted sheet, two pillow cases, to duvet covers and some other items in the dryer.
I allowed to cycle to run for about 70 minutes, before I canceled the cycle, as there were droplets of condensation on the wall and around the cycle selector (among other places). Clearly because the fan does not come on to pull air through the interior of the dryer itself. By the time I shut the dryer off, it had reached about 50C. Both a Cotton Cupboard Dry and Extra Dry cycle were terminated after only a few minutes, despite the clothes clearly still being damp. I have seen this behavior in my previous Siemens before: cancel a cycle midway through and and you'll have to use timed dry to finish the clothes, as the sensors will get confused. As stated above, after 40 minutes of "Low Heat" timed drying, the thermometer read almost 70C. That's probably the max the heat-pump can put out. | ||
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Post# 1166618 , Reply# 46 12/15/2022 at 09:53 (765 days old) by Logixx (Germany) |
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Post# 1168883 , Reply# 47 1/9/2023 at 11:23 (740 days old) by Logixx (Germany) |
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| Post# 1168892 , Reply# 50 1/9/2023 at 12:14 (740 days old) by wholelottared (Turkey) | ||
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To add to my latest reply #47 I forgot to add pics on my post, here are the pics of the current filters basically | ||
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Post# 1168916 , Reply# 51 1/9/2023 at 15:46 (740 days old) by Logixx (Germany) |
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That's good to hear.
Yeah, there will always be lint that makes it past the filters. But your dryer should be very well protected now and you can see inside the condenser and evaporator to check for fluff. I took the hose from my shower today (since my dryer is next to my bathtub) and blasted water into the condenser as best as I could. Despite me vacuuming the filters all the time, as well as the rubber seals, there was lint pumped into the water tank. I've been using the dryer for two years now, so I was expecting some lint. Here are some stills from the video I took. The lint pictures (it looks like more lint than it actually is) are from the 1st and 3rd time ran the pump (in service mode). The last picture is how I rinsed the area. However, I had to turn the water way down. | ||
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