Bosch WFLI2440GB overfilling

[daveg73]

Hi, went to this machine this morning, fills and stops, starts washing, fills some more, starts washing, keeps repeating this cycle.
Checked for pressure hose leaks and activated pressure switch with short length of tube, still does same thing.
Any help would be greatly appreciated.

[RickT]

Re: Bosch WFLI2440GB overfilling

Have you tried blowing into the pressure switch via the tube, plugging the tube and waiting for the click?

[daveg73]

Re: Bosch WFLI2440GB overfilling

Yep, done that,clicks immediately. if you blow and hold when machine is filling it stops filling and than starts again after about 5 seconds, release pressure and pressure switch clicks, so no pressure loss there.
I take it the switch is single level?

[nomadPaul]

I take it that you’ve checked the sump hose and pressure chamber underneath the tub for foreign objects and blockages ?

[daveg73]

nomadPaul wrote:I take it that you’ve checked the sump hose and pressure chamber underneath the tub for foreign objects and blockages ?

Did a rudimentary check, seemed OK, I assumed that manually operating the pressure switch would eliminate that possibility.
Is there any sort of timed fill after the pressure switch has activated or other sensor connected with water inlet?

[RickT]

Re: Bosch WFLI2440GB overfilling

Assuming that the water level is rising during this period of intermittent filling and not syphoning away, I would suspect pcb!

[daveg73]

Re: Bosch WFLI2440GB overfilling

RickT wrote:Assuming that the water level is rising during this period of intermittent filling and not syphoning away, I would suspect pcb!

I knew someone was going to say that 🙁
Thanks Rick, I’ll tell the customer the good news.

[Micky 32]

Maybe faulty presure switch? Bad contacts inside?

[Author]

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