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Hello Dave
The pressure switch that was changed was the one that sits on the circulation pump. I couldn’t see anything wrong with the ball bearing or the black rubber seal that it fits into. Peter has got back to me and stated that his problem was somehow determined to be the circulation pump – but he hasn’t yet answered a further query as to exactly what was wrong with the pump. He decided to buy another dishwasher rather than pay for a new pump!Have removed circulation pump and checked the impeller – didn’t find anything. It rotates, with modest resistance – can be rotated with a finger easily enough. Not sure how to electrically test the pump motor. Did check the associated small motor (appears to move a device which diverts the flow) – has resistance of circa 4.5k ohms, and the micro switch associated with the small motor – seems functional. Running out of ideas …..
Thanks – will give that a try. Incidentally I don’t get an email to alert me when you have added to this thread, although according to my notification settings I should do – and I did receive a couple of other emails relating to this website. I was hoping that Peter (‘Buildclean’) who started this thread would let us know where he got to with his problem – but maybe he’s not getting notifications either.
Hello Dave
I haven’t checked the circulation pump for blockages – presumably I’ll need to remove it from the machine and disassemble the rotor to do this?James
Did you get anywhere with resolving this fault? I have the same dishwasher and fairly similar symptoms, ongoing for about two years now. In detail –
I have a G5620 SC dishwasher that is a little over seven years old. Frequently (almost always) the Pots and Pans programme completely halts at certain points, typically at the end of the pre wash (about 20 minutes into the programme) and then again with about 1 hour 13 mins left and again with about 52 minutes left also again with 35 mins left. This coincides with periods when the machine is pumping out, and happens at the end of the pump-out. However there is no complete failure of pumping out – the machine is capable of pumping out water at a reasonable rate. However the pumping out sometimes continues for longer than one might expect – after the flow of water has ceased. My impression is that other programmes behave similarly, grinding to a halt after pumping out.Usually the programme can be re-started by any action which shuts off and re-connects the power – eg mains socket switch, On/Off switch on machine, or just opening and closing the door. Sometimes it is necessary to keep the power off for about 1 minute, until there is a very faint sound (maybe a relay resetting?) from the vicinity of the top of the door, where the PCB is housed. Once this sound has been heard, the dishwasher can be re-started by turning on the power again. I am also getting an F78 error code periodically, again associated with cessation of progress through a programme, but the F78 code is only generated occasionally, not every time I run a programme. The pressure switch has just been changed, as it was leaking (but it made no difference to the fault discussed here) and the one way valve (ball bearing) has just been checked and was found to be unobstructed. Any assistance appreciated.
It may be useful to add that throughout the two year period that I’ve lived with this fault, the basic functions of taking in water, heating water, spraying water, and pumping out water all appear to be, in general, operational – the machine just grinds to a halt sometimes as previously described.
