Thanks for the suggestions. I was thinking the same thing. I will repeat an experiment I tried - which is to lock out the buttons (an option on this model). This seems to have worked once last night for a 1 hour, no hi temp, no heated dry mode with the lock feature turned on.
The dishwasher (over 2 years old and outside any warranty) belongs to a friend. I have a couple of Kitchenaid dishwashers installed in 1984 which have never given me any trouble.
Is the control program in the dishwasher smart enough to detect a problem, drain the dishwasher and cancel the wash cycle.
If not then, as you said it has to be a control board/membrane switch problem.
Too bad I can't just plug in an OBDII reader in to the dishwasher and find out what is wrong like in a car.
The control module is a W10319897
- I think.
How long does it take a pro to replace the control board?
Would I learn anything by running a manual test/ field service test on the dishwasher?
I have been fixing appliances all my life 65+, so I will give it a try.