The error code F7E1 is identified as ''Basket Speed Sensor Fault''. This could be either a mechanical or electrical issue.
Whirlpool suggests the issue may be a locked rotor - check the basket, impeller, and motor can rotate freely.
Then, check (wire) harness connections from main control to motor and shifter. If the wires are loose, then the motor will not run.
[link|https://www.youtube.com/watch?v=GcSXlsGiLJs|Here is an explanation of the code and process.|new_window=true]