The first thing I would check is 120V at the power outlet and the plug connection.
Remove the bottom panel and check for burned wires at the junction box.
Check for reversed polarity at the power cord connection to the dishwasher.
Reversed polarity means the hot power cord wire connected to the neutral dishwasher wire and the neutral power cord wire connected to the hot dishwasher wire.
Reversed polarity could cause a damage to the control board.
If there is nothing wrong then check the thermal fuse, located on the control board box.
If this is not the issue then replace the control board.
- The part number for the thermal fuse is
AP3115186
- The part number for the control board is
AP3175633
Here are the break down diagrams for the Whirlpool dishwasher
Model DU960PWKQ1
Gene.