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Hello everyone….
Would really appreciate some advice please.
The above dryer is not drying clothes when any of the automatic programmes are selected. However, when a timed warm cycle is used, it seems to dry them just fine. When in timed, a full load inclusive of a couple of pairs of jeans takes about four hours to dry….. Is this excessive or about normal for this machine?
I have done the following to try to determine the source of the problem with the auto cycles:
-Full strip down and inspection of the machines interior. Vacuumed lots of dust out of it. However, the compartment containing the condenser was very clean. Minimal amount of lint removed from evaporator and heat exchanger.
-Inspected sump pump, seems fine.
-Inspected NTC sensor and tested with multimeter. Confirmed working.
-Thoroughly cleaned lint filters.Is it possible that the moisture sensor has failed? It looks brand new, no sign of any build up on it that may stop it working. I have not tested it because I’m not sure how to do so.
Any thoughts?
TIA
Should also have mentioned that the compressor appears to be working fine. Turns on when expected etc.
By luck I found your post, although I might not be able to help much!
For the third time in the four years I’ve had this dryer, I’m about to open it up again. I honestly think that they are a flawed design that Bosch keep quiet about…
Our dryer – regardless that the filters are always cleaned and the seals are good – gets fluff build up between the cold and hot heat exchangers. This is an area that does *not* get cleaned by this so called self cleaning function which only washes the front of the cold exchange (see my picture, the purple is the “wash” drop pipe and where it connects on the exchanger). Blue is the cold exchange and red is the heat side. Yellow/orange is where you will see the fluff layer in my photos.
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”615″,”width”:”400″,”src”:”https://i.postimg.cc/W3Vb7cdG/Screenshot-20220406-235804-Chrome.jpg”}[/IMG2]
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”281″,”width”:”500″,”src”:”https://i.postimg.cc/0jWkx6cn/20200725-152939-exported-3371.jpg”}[/IMG2]
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”281″,”width”:”500″,”src”:”https://i.postimg.cc/V6FsGZt3/20200725-152939-exported-4338.jpg”}[/IMG2]
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”281″,”width”:”500″,”src”:”https://i.postimg.cc/rsFVvGCz/20200725-152939-exported-9604.jpg”}[/IMG2]
I have to take quite a lot of it apart to get the cover off the exchanger including taking the drum out.It’s very noticeable when this is starting to happen. Drying times take hours, the drum gets hot and humid, you may see condensation on the window even and fluff will build up at the bottom of the door in cycle (even with a clean filter). The air is being effectively blocked from freely flowing through the unit and everything just heats up. Even any water under the exchanger that hasn’t drained yet gets warm, creates more humidity and compounds the problem.
Upon cleaning our drying is much, much faster. Automatic programs begin to dry the washing properly again, otherwise they either take forever… or finish wet.
One of the things that we suffer from is we have dogs and the bosch filter actually let’s bits of our dog hair go through it. Like little wires I’ll find them poking through the “plastic paper feeling” initial filter, so some clearly go all the way. Over time they are going through to the hot side and then things start building up – again you can see in the photo – it’s like a layer of dust with a bit of dog hair meshing it together.
If it were “washed” by the self cleaning function this wouldn’t be a problem. I notice bosch have changed the design and new “autoclean” dryers now have another filter in front of the exchanger:
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”318″,”width”:”300″,”src”:”https://i.postimg.cc/fR6bJ9Zg/Screenshot-20220407-004226-Chrome.jpg”}[/IMG2]
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”173″,”width”:”300″,”src”:”https://i.postimg.cc/zfKGWGGD/Screenshot-20220407-004246-Chrome.jpg”}[/IMG2]
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”height”:”133″,”width”:”300″,”src”:”https://i.postimg.cc/vZ1BYzRV/Screenshot-20220407-004359-Chrome.jpg”}[/IMG2]I suspect if I buy that mesh and put it before the exchanger it might help me, I may try it.
The whole filter unit might even retrofit into ours because I’ve seen they do let you cut a maintenance entry there and s bosch sell a plastic maintenance flap that looks a similar size (without the vee shape and filter obviously).
Last thing. There is a test mode that shows compressor temp etc.
To get the dryer into it, turn it on and as soon as the display comes on, turn the dial from Cotton to Allergy+ and immediately then press the Drying Target button and while holding that turn the dial one more time clockwise. You’ll see the screen then will say p01. You can find online the bosch test mode descriptions that are mostly relevant and equate to each thing.Good luck. I’m never buying a self cleaning dryer again!
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