Question about Bosch Dryers

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I have a two year old Bosch Ecologixx 7 Tumble Dryer (WTW84560GB/02) whose condensation compartment full indicator is being activated increasingly early, to the point where I am needing to empty the compartment 4-5 times every time I dry a load of washing, even though it is virtually empty each time. I have cleaned the condensation filter several times as per the User Instructions and even resorted to soaking the filter in vinegar overnight but this has made no difference. Please can you help

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I had exactly the same problem and got it fixed by the Bosch repair service today.
The culprit is that in certain areas there may be algae in the air that thrive to grow in the main water reservoir and clog up the water pump that fills the condensation compartment.
(note: There are two water tanks in the Ecologixx 7 - one user serviceable condenser tank up top and the non-user serviceable main water reservoir sealed inside the machine)
This is main water reservoir is located sealed under the water pump under the tumble dryer drum.
Dismantling instructions: 1. remove the top of the tumble dryer first (two screws at the back 2. remove the right side panel with another few screws (looking from the front) 3. disengage the multi-tooth elastic band by twisting the spring loaded roller at the bottom).
After this you have access to the water pump and the Styrofoam float that triggers the empty condenser tank warning.
If the pump is entirely clogged you might need to replace it and the float.
Then clean the bottom water reservoir from the algae infested water with a pump+hose and a bottle washing brush and circulate clean water through the machine (re-engage the elastic band before running the engine) with the Warm-program.
To kill the algae you need to run about 250ml of clear raw vinegar through the pump system by running the machine in the Warm program for 10min and then rinse the excess vinegar out by putting about half a condenser tank of warm water into the machine and running the Warm-programme for 30min. (this will release the clean water into the condenser unit for the self-cleaning function and then pump it back up into the condenser water tank and dilute and circulate the raw vinegar out of the machine).
You should also do a vinegar sanitization run before all extended periods of disuse of the machine by pouring 250ml of vinegar into the large round hole under the top condenser tank (this is where the condensed water is poured for the self-cleaning run).
Run the Warm-program without the condenser tank in place until you can verify visually that the pump is circulating the vinegar through the hose in the top left back corner of the condenser tank opening (there is a overflow drain at the back so everything coming up goes promptly back down into the main reservoir (small hole in the back corner bottom).
Then place the condenser water tank half full with hot water (not boiling) and let the Warm-programme run for 30min to dilute and circulate the vinegar-water solution out of the machine back into the condenser reservoir.

Posted on May 30, 2011

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I had exactly the same problem with respect to the compartment full indicator on the same model but the Australian version (WTW84560AU).
The problem was not algae, but actually the pump spindle being clogged with lint and hairs that had built up inside the pump chamber. this meant the spindle couldn't turn, tank couldn't drain, thus the machine thinking it was full.

To clarify the previous instructions add the following steps after step 3.
3a. Once the rubber belt is disengaged from the motor, the motor will drop down exposing an area directly behind the belt location on the floor of the dryer. This is where a small tank is located. (it is not quite obvious that it is a tank, especially if there is a build up of diust over it.)
4. There are two set of wires going into the top of the pump (1 red, 1 pink). Disconnect the wires via unclipping the phoenix connector blocks.
5. Disconnect the black hose going into the back of the tank.
6. Unscrew the two torx that secure the lid of the tank.
7. Remove the tank lid from the top of the tank.
8. There are two holes inside the main shaft of the pump and inside this you can see if there is any buildup of lint or hairs. I used some bottle nose pliers to pull out this gunk that had wrapped around the spindle.
9. Unclip the white plastic end of the pump assembly to make sure that there is nothing blocking the impeleller mechanism.
10, Rinse out the pump assembly section being carefull not to get any part of the motor wet.
11. Check that the rubber drainage hose is not blocked.
12. Remove the black styrofoam float from within the tank chamber. Rinse.
13. Check the tank chamber for any more lint etc. (I also found a big section of lint here that would have built up and affected the function of the pump).
14. Reassemble the pump, put the float back in, Replace lid of tank.
15. Reconnect hose. replace screws. reconnect phoenix connectors for each set of wires.
16. Reconnect rubber belt to motor.
17. Reassemble rest of machine.

Follow other steps for algae removal if necessary.

This fixed the problem for me. Hope these extra steps helps clarify how to remove and clean out the pump.

Posted on Aug 05, 2012

  • Anonymous Mar 05, 2016

    This detailed description was very helpful for me when disassembling the water pump. I found everything exactly as described, including hairs around the shaft of the pump and a large amount of lint/slime on the bottom of the tank. The machine works just fine now. Thanks a lot!


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I have this machine, and have had the repair man out four times to this fault, so this time I tried something my self, it resolved the issue and the dry has now been operating for a month with no return of the problem. My solution requires no disassembly.

The problem is a coating of slime on the tank in the bottom of the machine. This causes the machine to think the tank is always full so cuts the machine out with the icon telling you to empty the condensate container. For a fix, you have to fully remove the slime or it will just build up again.

The way I did this is to fill the condensate tank with water and pour it into a measuring jug and see how much it holds. Next boil a kettle of water and fully dissolve a dishwasher tablet in a jug or container with the same amount of water that the tank holds. Next, pour the water (use a funnel or pipe) into the compartment where the condensate tank slides into, it should run down into the tank at the bottom of the machine. Leave it for an hour, then put the condensate container into it's slot on the machine and start the machine. The water should pump up into the container, probably with a load of fluff. Hopefully the machine will now work properly.

Posted on Feb 16, 2015

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  • Anonymous Mar 05, 2016

    I'd recommend this procedure as part of the usual maintenance routine for the EcLogixx 7, for example once every year. That should avoid the lint to build up and clog the system... Dishwasher powder is probably at least as efficient as vinegar, and smell so much better. Consequently, when using dishwasher you don't need to rinse With Clear water afterwards.

  • Summer Dec 03, 2016

    Many thanks Trevor1964 for this tip. This worked fine for my EcoLogixx7 and helped to make it "alive" again, but caused some additional problems too.
    I dissolved the whole dishwater tablet as described above which made really great job after one hour. But caused to produce an enormous amount of foam inside the bottom water reservoir too. And this caused to flash an info again that condensation compartment is full, again and again and again. I was not keen to unsrew my tumble dryer afresh, hence, I started to pour a lot of clean water (approx. 2 l each time) to the compartment where the condensate tank slides into. And, after 7 times/pourings, my EcoLogixx7 stopped to flash: condensation compartment is full, the foam was finally removed.
    Now it works perfect :)

  • spiralnic Aug 22, 2018

    Amazing. Saved me the trouble of a costly call out or the hassle of doing all that dismantling myself to get to the tank. It took persistence and repeated flushing but magically all now works properly. Will definitely be doing this periodically as maintenance now, especially if the dryer will be unused for a time. (Like summer, when we use the line.)

  • Brendan Sweeney
    Brendan Sweeney Oct 13, 2018

    Fantastic. I tired this and my dryer is back to its former glory. So pleased. One slight modification I did make though was to use a tablet for cleaning dishwashers, rather than dishwasher tablet to clean the dishes. The dishwasher cleaners tablets cost £4 for two, made by Fairy. It has ingredients to break down grease and slime and is not very soapy.

  • David Briggs
    David Briggs Nov 04, 2018

    I had this problem occur on my 5-year-old EcoLogixx WTW86561GB. The condensate tank capacity on this drier is 2 litres. I tried both of the chemical approaches, dishwasher cleaner first. That didn't help, with very little difference in the water before and after, but the dishwasher tablet did. I left it in for an hour and then started the normal cycle. I had to empty the tank but the cycle completed. There was quite a lot of gunk. Some of that must have come from the condensate tank, as that is much cleaner now!
    Thanks for the suggestions.

  • Rachel Rainbird
    Rachel Rainbird Jan 08, 2019

    Thanks so much!! Tried this and it worked straight away. Saved me all kinds of grief! So grateful for this online community :-)


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This happened with my beko tumble dryer. There is a panel at the lower back of the dryer and opening this gains you access to the float and trip switch that tells the dryer it needs emptied. This area was clogged full of wet lint and caused the water to not drain away fast enough.

Cleaning this will stop water building up and tripping the switch.

Posted on Nov 30, 2014

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Posted on Jan 02, 2017

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