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Re: Bosch condenser tumble drier.
Maybe the pump is bad. With the power off, remove the power wires from the pump terminals. Then connect the power wires to an electrical tester light or meter. Then turn on power and run the machine in a dry cycle. If you get power, then you know that power is getting to the pump abd the pump is bad.
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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.
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.
This easy to use white Indemnity condenser dryer will make a welcome
addition to any kitchen. The 10 minute cool tumble and reverse tumble
option will help keep creases in your fabric to a minimum. Energy
efficiency ratings & performance: Energy efficiency rating: C.
Maximum drying capacity 7kg. Condenser dryer features: 160 minute
timer. Including 10 minute cool tumble. 2 dryness levels. Manual
control. Reverse tumble option. Reservoir full indicator. Fluff filter.
Size H85, W59.5, D58.5cm. Drying programmes Freshen up cycle.
Manufacturer's 5 year parts and 1 year labour guarantee. Technical
specifications: Energy consumption: 4.48kWh per cycle based on dry
cotton cycle. Energy consumption: 336kWh per year based on dry cotton
cycle. please comment on my post or vote for the solution.
Condenser water pump failure. The tank has a float in it attached to a micro switch. That micro switch powers the pump. I have never replaced on but I strongly suspect that switch has something to do with it. Either that or something has the pump jammed or the pump has failed. The water gets removed from the clothes by heating the air and tumbling the clothes around. The air gets saturated with water and goes into a radiator that condenses the air to remove the moisture. The water fills into a catch pan with a pump and float. When that water fills the pan the flot kicks on the pump and the water goes for a ride up to the collector where it is supposed to be periodically emptied. At the same time you clean the lint filter you should dump the water I suppose. Facinating technology. It has not yet made it over to my neck of the woods but I imagine one day it will be here. I have an asko manual but no bosch manual sorry.
As a matter of fact I have solved the problem. The dryer is now fully functioning again. :-)
I'll try to explain how to fix the problem:
The water that condenses in the condensor (doh!) drips down into a container situated below the condensor. The moist air that passes through the condensor is the same air that circulates via the clothes, thus it also contains some lint that the filter doesn't catch. Over time there will be some build-up of lint and mucus (?), clogging the tank AND a sensor that sends a signal to the electronics to start the pump that evacuates the condensed water to the removable tank in the upper part of the machine. This messes up the function of the water evacuation system.
Alright, pull out the condensor and find a hatch in the 'floor' in the farther part of the compartment. Below the hatch you'll find the container that collects the condensed water. Start by cleaning it as thoroughly as you can. There are a few 'nooks and crannies', take your time, also flush with some fresh water and maybe some gentle cleanser to get rid of the mucus. The pump and the sensor for the pump are located in the left part (viewing from front of the machine) of the container. Try to flush there as well.
If this procedure doesn't solve the problem you'll have to disassemble the machine to also be able to remove the pump and sensor housing. I had to do this on mine. Quite a few screws to remove and keep track of, but pretty straight forward if aren't too uncomfortable with 'fixing things'.
I have some pictures of the 'project' somewhere, let me know if you would like to see them or if I may help you some other way.
Have you taken the condenser itself out from the bottom of the machine? Remove the condenser from the bottom door and rotate the clamp tags which secure it in. Slide condenser out (aluminium mutli-finned box assembly) and carefully take it outside. Use a garden hose with lots of water pressure to spray each vent passage carefully to clear lint and dust away. Passages must be cleared in both directions, long ways and cross ways. Cross ways is the problem area and once you finish clearing the air ways you should see daylight through the condenser easily. Reassemble and always clear lint filter in the door /drum area.
There are three water reservoirs - one at the bottom behind the condenser, a second at the back bottom of the machine and then a third at the top which is the one you would normally pull out to empty.
There is a hole at the bottom of the filter in the first reservoir (at the back of the condenser) which leads to the second reservoir at the back. If the hole gets clogged up with lint/muck then the reservoir at the back does not fill up.
So to solve this, unplug the machine, take out the condenser (front left bottom of the machine) reach through to the back and mop up the spare water with a towel and check that the hole to the back reservoir - you can feel this it is towards the right side at the back of the machine is clear from muck.
Once you have cleared it, water will flow to the second reservoir and then (once you switch on the machine) up to the main removeable reservoir at the top.
I've sorted mine this morning. First, disconnect from the mains - VERY important! Pull out the metal condenser unit at the bottom, and behind it, there's a small hatch in the bottom to the reservoir. This can get gunked up with water, and is very difficult to clean - HOWEVER - I've found a really easy way of cleaning it. I've got a VAX carpet washer with a hose attachment, and I simply sucked all the water out using that. If you don't own a carpet cleaner maybe borrow one. I did this this morning, and my tumble-dryer's still running happily after an hour! It is possible to clean it out without vacuum, but it takes a LOT longer, and the vacuum of the cleaner pulls out gunk that is hard to access. Another place where gunk collects is behind that hatch right at the back - there's a tube up to the right. I pulled out quite a long chunk of lint. However, that wasn't the solution on it's own, I still had to clean out the reservoir as above.
This model is a condenser dryer, at the bottom of the machine if you open up the flap you will see the condenser on the left hand side, the manufacturer recommends that you clean this unit once every month and also empty the reservoir and clean the fluff filter after every use. While this may seem like a lot of hard work there is a very good reason for this. I suspect that your problem is due to a build up of fluff and or gunge in the condenser and bottom of the machine. Remove the condenser and give it a good clean of all fluff, you can run water through it either in the sink or bath as the best way to do this it is very fiddley using just your hands. Next check to see if there is a build up of water in the back the machine where the condenser usually sits, you will have to lie on your stomach and reach into the back of the machine (OBVIOUSLY ENSURE THAT YOU HAVE UNPLUGGED FROM THE MAINS SUPPLY BEFORE YOU DO THIS!) along the floor of the machine you will feel a channel cut into the plastic which runs into the sump at the back of the machine, if you have not cleaned the machine properly this is probably blocked and is the culprit. With this blocked the water is unable to travel to the pump that takes the water from the condenser into the resevoir at the top of the machine, and therefore it stays in the machine and can get thrown about onto the electrics and could cause the machine to cut out and trip your electrics! If this is not blocked check the black rubber pipe leading from the pump to the reservoir is not blocked, failing that perhaps the pump (in the plastic case at the back of the machine) is faulty and will need to be replaced.
I have just read your question on Fixya .com and I have the same problem with my dryer. I know your question was raised some time ago with no answer on Fixya...but I was wondering if you ever got to the bottom of the problem? Like I say I have the same model here in the UK and cannot find anyone who knows what the problem is (without charging me the earth to come look!) Hope you can help...Thanks Simon B, Manchester...UK