Getting F33 error, says it is overfilling or leaking and to check the pressure switch and flow meter.

I am having problems with a whirlpool washer model GHW9400PW4, serial CST1518888.
Getting F33 error, says it is overfilling or leaking and to check the pressure switch and flow meter.
I checked both, even tried new pressure switch and flow meter, still same problem, keeps filling.
Checked pressure switch hose (plugged one end, blew into hose) no air escapes, blow into hose when connected to tub, bubbles when water is in tub.
Ran diagnostics and it stops at C05. Try to stop diagnostics and pump runs. Unplug unit, plug back in and pump runs, can’t cancel. Only way to stop pump is to manually unlock door.
I’m at a lost here, can this be a bad main pcb (machine control microcomputer)?