brand new Bosch Home Professional tumble dryer made weird knocking noises. What was the problem ?

[wholelottared]

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

 

[logixx]

Glad your new dryer doesn't make that noise. I tried the Mix cycle on mine, which got one software update probably a year or more ago, and it was a fail.

 

[wholelottared]

Reply to #40

Oh wow @logixx , I always thought Bosch/Siemens puts the software update to the menu only for the looks of it and never actually updates it's washing machines or dryers, you're the first person that i saw who said you received an update actually haha. I don't think that was a firmware update, maybe a security update. Because my friend who also has the same device as mine has the firmware version 2.0, and mine has 3.0 but he never received an update and it says he's up-to date, even though clearly mine is a newer firmware version. He says he never received an update before.

Btw, by fail, do you mean the front fan not turning on during Mix?

Also lastly, can we please compare “Mix cupboard dry +1” and “Cottons cupboard dry +1”, I would be so happy if someone can do this for me. I want to see which one gets less hot so I can use that instead. When I use Cottons it finishes much faster compared to Mix but I don't know if it's because it heats more or if it's because it doesn't overheat. Would be so happy if someone can try, thank you so much

 

[logixx]

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.

 

[mrlaundry1011]

My Siemens washer has received like 2 updates since I’ve had it and my Miele W1 has updated around 3 times since I got it in feb. I think the dryer has recieved 1 update and so has my fisher&paykel. Sadly won’t be able to tell you what cotton reaches as I never use the cycle, I don’t dry bedding in it at all and the rest go on mix or towels. It’s funny how my sisters Siemens washer dryer dries at a lower temp than your heat pump logixx but it does top at 71c at the very start and then cools to 62-64 for the remainder. It makes sense that nothing has shrunk since they were already being dried in the Bosch previously

 

[logixx]

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.

 

[wholelottared]

Reply to #44

Thanks for your test Logixx, but I think there's something weird with your device. Are you sure nothing's faulty there? I never had condensation leaking from my device, at worst, it dedects the water level at the bottom got too high and it pumps it up to drawer, or it starts the front fan. For example when I start a duvet program with a huge duvet that got spun in 800rpm, it finishes in like 3-4 hours with zero leaks outside of the device. But yours leak things even with sheets and pillow cases etc? It's weird in my opinion, I never saw moisture on the screen/buttona or on the outside of the device before.

 

[logixx]

It only happens on Quick|Mix. Other cycles will raise the humidity in my bathroom but there's no visible condensation. It all comes down to not running the fan and being rated B for condensation efficiency (87% condensation rate).

 

[logixx]

Did you get the extra filters?

 

[henene4]

It's a lot about how big the room is, what your temperature in the room is etc.

Both my A class, 91% condensation efficiency dryers raised moisture in the bathroom noticeably.

My old bathroom was only 6m² (or 54 sqft) and being close to the coast, it was very humid. After each load I had to open the window.
Living down south again, my bathroom is a little bigger (8m² 72sqft) but you still feel the heat and moisture.

Again, it's just simple maths.
At 90% condensation efficiency, if you have an 8kg load spun at 1400rpm, that load has 4 liters of water in it at the beginning, and 400ml of that will make it into the room regardless.

 

[wholelottared]

Reply to #47 (Logixx)

Hi @logixx , yeah I bought them, and I'm using them since the replaced device came. So basically it has 3 or 4 filters right now. 2 double filter on the door (the ones that all the other models have, which I bought myself), 1 in front of the condenser, and one at the bottom which normally collects the wet fluff. And plus AutoClean on top of these of course.

A really interesting thing I noticed is, some fluff still somehow collects at the bottom wet fluff collector, and it's always in the middle part of it. This means that, some fluff still escapes the double filter on the door, then also escapes the condenser filter, and then it gets washed away with AutoClean from the condenser to the bottom of wet fluff collector. This shocked me at first, because if it's even escaping the filters I bought, I can't believe how people are normally using these devices without buying additional filters. No wonder why older SelfCleaning Condenser models were getting clogged after some time. What happens on mine is normal though by the way, because I clean the door filters after every use but I clean the other two bottom filters from month to month. So those wet fluffs are accumulated in over a month, and they're really rare. This shows the AutoClean is working great too, because it means all the fluff that still somehow escapes are getting flushed away to the bottom collector.

In conclusion, my condenser is looking ultra clean right now, and I think this (AutoClean + additinal double door filter) is the best solution in the market for fluffs right now, even better than Miele filtering (because in Miele if fluff somehow escapes, it doesn't gets washed away with the condenser). I was normally going to get an Electrolux/AEG dryer, but on those there isn't a condenser filter and even if there was one it wouldn't have been good like mine.

I know this was a very lengthy post, but I hope everything is clear Thank you

 

[wholelottared]

To add to my latest reply #47

I forgot to add pics on my post, here are the pics of the current filters basically

 

[logixx]

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.