Check the continuity between each of the heating element terminals and the ground. Replace it if there is any continuity.
I believe, due to water leak it's better to replace the heating element in any way.
Run the same test for the hi limit thermostat.
The hi limit thermostat
Check all wires.
- The part number for the heating element
AP3884745
- The part number for the hi limit thermostat
AP3010530
- Here are the break down diagrams for the Whirlpool dishwasher
Model GU1100XTLQ1
Good luck.
Gene.