For the Kenmore HE2 Plus washer, how do I know if it's a Motor Control Unit/MCU (8540135) vs the Microcomputer Machine Control Unit failure (8540788)? Does, for example, the Motor Control Unit control the door locking or some other feature and if my door locks, then I can rule out that part? Thanks.

SOURCE: Kenmore HE2 Plus Error Code: F-20

You probably have this solved by now but for others who read this as I did.............
F-20 means
“F20” on display
(Water Inlet Problem—no water or insufficient
water supply) Select PAUSE/CANCEL twice to cancel the cycle
Unplug washer or disconnect power. Check the following: Are water faucets completely turned on?
Are screens at inlet hose connection to washer
clogged? Are water inlet hoses kinked? Are water inlet hoses frozen?
Hope this helps everyone else as it did me, thanks

SOURCE: Kenmore Elite HE4t Washer Control lock lit, door locked

121 MINUTES USUALLY DRAIN CYCLE PLZ REMOVE 3 BOTTOM PANEL SCREWS 7 MM SCREWS, TO OPEN DOOR SLIDE RIGHT HAND TOWARDS DOOR LOCK ,THERE WILL BE A SMALL LEVER TOO PULL DOWN ,NOW ITS OPEN,,, SINCE U HAVE BOTTOM PANEL OFF PUMP IS RIGHT IN FRONT REMOVE PLASTIC HOUSING CLOCKWISE ,,,REMEMEBER HOLD 3 GALLONS OF WATER STILL ,HAVE BUCKET READY ,NOW CLEAN OUT PUMP AND DEBRIS ,, CLOSE IT UP SHOULD BE FINE NO MORE PROBLEMS ,,,,,

SOURCE: door not locking on front load washer

No reset, sounds like a bad door lock switch. The unit is under warranty, call for service.

SOURCE: Kenmore HE3 CONTROLS LOCKED

Apparently there is a child lock on the machine and by holding down the spin and drain button for 3 to 5 sec. this will unlock the controls

SOURCE: f21 code on kenmore he2 plus

Clean the filter in the pump behind the bottom panel,but remember it's full of water,If it's on a pedestal you can take the pump loose from the mounting pull it out a little and put a small pail or bucket under it before you open the trap.if it isn't on a pedestal it's a bit more challenging unless your in a basement with a floor drain. Open it very slowly and let the water drain a little at a time don't take it all the way out or you'll be in for a flood....good luck