Product review (4 stars): Saved buying a new washer and got an upgraded part!
Our Maytag Centennial washer suddenly quit filling with water, both hot and cold.  Applying power directly to the solenoid valves got water, so I knew that wasn't the problem.  The wiring diagram, that was stashed in the control area, indicated where power was coming into this sensing switch and where it should be coming out at the appropriate times.  There wasn't any power coming out, so I knew the old switch was the culprit.  WARNING:  TO PERFORM THESE TESTS, IT IS NECESSARY TO BE WORKING WITH HOT WIRES.  IF YOU DON'T KNOW HOW TO TAKE APPROPRIATE PRECAUTIONS, GET A QUALIFIED TECHNICIAN.  Swapping out the switch itself is a 5 minute job.  Access the control area using a plastic putty knife to release the front corner latches.  The replacement part is Revision G.  My original part was Revision C, so there have been multiple changes.  We still don't appreciate the load sensing feature of this model, as it seems to not use enough water, but lifting the lid after starting will override it.  This switch controls multiple functions, so various malfunctions can be traced back to it.  My problems were probably the result of a voltage spike that zapped the circuit board inside it.  This replacement part might very well deserve 5 stars, but who knows how long it will last?