Whirlpool adp8500 odd fault

[bubs]

Hi, strange dishwasher fault week….
Have a Diplomat (whirlpool) ADP8500 (8545001157400) to repair.

When you start the cycle during the drain and fill part the whole machine pulses on/off, the fill valve, drain pump and display lights pulse on/off together.

If you wait for it to fill the circ pump kicks in and it sounds fine and the display light stays on. I measured a steady 240v at the display pcb so maybe this is faulty but would this affect the drain pump and fill valve?

Found a similar fault in your archive but not any answer.
The main pcb in the base looks fine, no bad connections.

Anyone had similar?

Thanks
Graeme

[electrofix]

Re: Whirlpool adp8500 odd fault

had similar faults like this before normaly the power supply on the pcb timer

a lot of appliances use a capacitor to drop the voltage down from 230v to 20 or so to supply electronics. As these caps get older their resistance rises causing voltage to drop. it is a similar effect to low batteries

in you scenario you turn on voltage drops electronics stall swich off and as the voltage rises switch back on again

hope this helps

Dave

[martinm]

Re: Whirlpool adp8500 odd fault

Also have seen the insulation reading being low cause this on these dishwashers as well

[bubs]

Re: Whirlpool adp8500 odd fault

Thanks Guys, yes its similar to the whirlpool fridge pcb faults.

[keithwilliams]

Re: Whirlpool adp8500 odd fault

we’ve got a couple of other threads running about this. i’m pleased to see capacitor mentioned here cos i just summised in my thread that this may be the case. please please if any of us solves this for sure can we please let everyone know how.
thanks
keith

[Author]

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