Whirlpool Dishwasher Won't Advance: WDT720PADM2

[amappliancewi@gmail.com]

Hello, I am working with someone on a Whirlpool dishwasher, model # WDT720PADM2. They came home to find a wooden spoon had fallen onto the heating element and burned causing smoke to come out when the door was opened. Since this time, the dishwasher would always fill but not always advance into the wash cycle. None of the indicator lights blink when this happens. If we open and close the door, it  will not engage for about a minute then the drain motor lightly whirs (the pump does not fully engage and drain yet) for about a minute and clicks off with a relay sound and then sits for a minute before successfully draining, filling and running a normal cycle. It currently fails 1 out of 5 attempts. It is important to note that it failed more often before the unit was reset with the circuit breaker. The frequency of failure has decreased since the reset.

 

I checked service diagnostics for error codes and none were listed. Then I ran a diagnostic cycle and no issues were noted / error codes listed. The heating element is functioning. I did a visual inspection of the turbidity sensor in case there was evidence of smoke decoloration that might cause the sensor to think the dishes are more soiled and it will get stuck in a cycle. The turbidity sensor appears to be clean and clear. 

 

Out of curiosity, the dishwasher has a 1-Hour Cycle. Would this bypass the turbidity sensor on this model? We could do some further testing with this cycle and see if it is non-sensor related.

[amappliancewi@gmail.com]

I received this service bulletin and am going to go ahead and test for 120 VAC to the wash motor during one of the cycles that fails. I am curious how the burning of and smoke from the wooden spoon might contribute to a possible failure of the control board or wash motor but alas, there is a lot of mystery in this world.

chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://msaworld.com/Ajax/GetAttachment?attachmentName=servicepointer-w11224673a-sump-washmotornotstarting.pdf 

[Budget Appliance Repair]

Here's the correct link to the above service bulletin:
https://msaworld.com/Ajax/GetAttachment?attachmentName=servicepointer-w11224673a-sump-washmotornotstarting.pdf