Some lights were not working, now heater not working (whirlpool)

I really can’t tell as it may be the main control board.

First check the heating element

Solution 1:

Heating Element

Some dishwashers use a heating element to heat the dishwasher during the drying cycle. If the heating element has failed, the dishwasher won’t dry dishes properly. To determine if the heating element has burned out, use a multimeter to test it for continuity. If the heating element does not have continuity, replace it.

Here’s how to do it and the part:

https://www.repairclinic.com/RepairHelp/...