Whirlpool WDT710PAYB5 Dishwasher not getting hot

Hi, I have a model WDT710PAYB5 Whirlpool dishwasher. It seems like it is not getting hot during wash or dry, leaving white residue on plastic on top rack. After I run the diagnostics mode to get error codes, it appears that my heating element does work for a while, but eventually the heat goes away again. The error codes I get have nothing to do with heat, 6-2 (Inlet Fill valve electrical problem), and 10-1 (dispenser electrical problem). My tablets are dispensing just fine, and the dishwasher fills and drains the right amount of water, despite the error codes. Appreciate any help debugging.