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Problems started with the drying cycle the day after a toddler had been randomly pressing all the buttons on the front panel and turning the control knob.
On a drying cycle water would occasionally build up in the drum wetting the clothes.
An engineer was called out who diagnosed a faulty control panel, but at over £230 he later advised the machine was beyond economic repair. He also originally suggested replacing the cold water inlet valve as the solenoid for the trickle feed for the condenser was reading high at 6 K ohms. I sourced a second hand front panel and bought a new cold water inlet valve. After fitting them the first run of the dryer was fine, but on the second run the items were again wet due to excess water temporarily being allowed to accumulate in the drum. It’s almost as if the drain pump (which BTW is relatively new) decides to stop when it should either be running continually or if a sensor to command the pump to run is exhibiting an intermittent fault, so it lets the water build up. How does that part of the system work? Is there a sensor, or does the Bosch machines just have the drain pump running continuously during the drying cycle?Machine washes fine, spins fine, drains fine, i.e. all the other functions of the machine seem to be ok.
I’ve had the top fan off in the dryer section, and cleaned the years of gunk off the fan and the parts of the top of the plastic condenser body I could reach.
Any ideas anyone ?
Maybe a silly question, but could the toddler’s pressing of the front buttons have done something and can that be reset?
NB It’s now running with a different ‘new’ control panel and rear relay clip on pcb board, i.e. not the control panel and electronics fiddled with by the toddler.
Thanks in advance for any advice.
Re: Clothes wet on drying cycle Bosch WVT1260GB washer dryer
Hi. Presume, as you said, your using all new second hand pcb`s i.e. the mall clip on pcb is NOT the original one:
The small clip on pcb controls the tumble drying functions in conjunction with the larger/main pcb. I cannot answer the basic question as to whether the pump should be on all the time OR is cycled on x seconds and then off y seconds but what I have come across is that your recently new pump MIGHT be breaking down over the drying time i.e. goes dead = h2o in drum. Was this pump a cheap copy because even though it physically fits it maybe unsuitable for use with a washer dryer but ok for use with a washing maching version as the windings over load, if fitted, gets too hot due to the several hours running time and triggers = no go for pump until it cools down which given the pump would be very hot to touch could take ages to cool so if it does stop pumping by timing things pause the machine for 3 hours then restart, if the pump then works I would think it `ll be the pump.
Whether of course this is a consquence of a fault with either board is unknown though I`d think that if all the boards are “new” the likey hood of having exactly the same problem is pretty remote. As far as known no other components would be responsible for the fault you have.Re: Clothes wet on drying cycle Bosch WVT1260GB washer dryer
I’ve done more reading round, and I think maybe I’ve got some understanding of the fill/drain system. It seems that the machine has a pressure sensor, as the drum fills with water it compresses the air in an air filled, air tight tube which leads to this sensor. On filling for a wash, the sensor has a higher pressure switch which reports back to control panel via that now closed circuit. The control panel then sends the signal to close the main water inlet valve.
Similarly during draining and drying , I guess there’s a lower pressure switch in the sensor which sends a signal, maybe when it’s open, to the control panel which then turns off the waste water pump.
Maybe in my case that part of the pressure sensor/pressure switch is a bit dicky. So when it should be telling the control panel to switch the pump on to pump away a buildup of the condenser water, it doesn’t, water builds up in the drum and wets those clothes or part of the load that is at the base of the drum.
I had the pipes off, and checked for anything might cause a random/temporary blockage of the pressure sensor pipes, unfortunately nothing was found lurking in those pipes.
People seem to say that the pressure sensors themselves rarely malfunction, but I think I’ll replace it to see if that cures the problem. Compared to other jobs on this machine, it’s relatively easy to get at and remove.
Still any other ideas, reset procedures, advice would be most welcome.
Thanks.
Re: Clothes wet on drying cycle Bosch WVT1260GB washer dryer
Thanks for that comment. The new waste pump was fitted by an engineer, I can’t say for certain but generally they seem to fit genuine Bosch parts. Their view is that it’s less hassle CF the pattern parts, as they offer a longish guarantee with all their repairs.
It’s something to check though. Thanks for the advice.
PS Yes the clip on pcb board was also changed along with the main panel.
PPS pump isn’t shutting down due to overheating during the drying cycle. Just isn’t being told to pump every time when it should be, just sometimes.
Re: Clothes wet on drying cycle Bosch WVT1260GB washer dryer
Replaced the pressure sensor today, but clothes are still coming out wet through on the drying cycle. So too much water (from the condenser feed) must be accumulating in the outer drum. Once that fills up to a certain level you get a puddle in the bottom of the inner (washing drum) drum that wets the clothes.
I’ve run out of ideas, so we’ll keep it as a washer and get a separate tumble dryer.
Defeated.
Re: Clothes wet on drying cycle Bosch WVT1260GB washer dryer
Solved the problem.
Quite possibly the problem had nothing to do with the control panel and the washer dryer board, nothing to do with the cold water inlet valve whose resistance reading was a bit on the high side, and nothing to do with the pressure sensor. Nothing to do with a blocked condenser.
What solved the problem was replacing the drain pump.
The original pump was an Askoll model M.50, which was replaced about 18 months back by a washing machine engineer who fitted a new pump an Askoll model M.221 . Looks like a straight equivalent, same amps and power as the M.50. Anyway the new pump I bought was another Askoll model M.50 drain pump.
The old pump was removed by removal of a single Philips screw then rotating the pump body anti-clockwise about 1/16th of a turn, then it can be pulled off. Reversed these steps to fit the new pump.
Thought I’d come back and post the fix. Nb the pump I replaced was still fine for a normal wash, and could do the rinse and drain. It was not showing the fault code F04, which is indicative for a drain fault.
A weak/failing pump obviously can give the symptoms I had i.e. Either water pooling at the base of the inner drum, or wet/damp patches on machine ‘dried’ laundry.
Thanks the suggestion BTW that the pump might be the possible culprit.
Thanks Benny26 for taking the time to detail your solution.
Had the same symptoms you described. Clearing fluff from the condenser made no difference (although it needed doing).
Found your detailed commentary, ordered a new M50 drain pump for £16, fitted it. Now all works like a charm.
Many thanks from three years in the future!
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