Excuse me — that is for a washer, not dishwasher.
It seems the F7E1 suggests the Heating Element does not work, which explains your confusion.
Have you replaced the [link|https://www.searspartsdirect.com/diy/repair-guide/how-to-replace-a-dishwasher-heating-element|heating element|new_window=true] on the dishwasher before? It is a possibility that the wiring has been disturbed or disconnected.