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My Kenmore H2Et washer has a F-01 error code and won't start. The error happened while the washer was in its spin-cycle and attempting to drain. The door remained locked and we tried to get it to resume or run its diagnostic but would not start up again (note, I'm not sure we followed the steps to run the diagnostic test correctly before I started pulling things apart). Note, this model is similar to the Whirlpool Duet Sport. 1- I pulled out the power cord, unlocked the door manually and opened the bottom access panel to access the drain cap. I removed a lot of debris, it was quite dirty. I screwed the cap back on, plugged the power cord back into the outlet and tried to start it. Again I got F-01, door does not lock, no water through the inlet values, no motor start. 2- I read from the manual that the CCU needed to be replace. I researched the Internet and read somewhere that if we hear the relay when the unit is plugged in, the issue is mostly likely the MCU. Several folks claimed it fixed their issue, so I went ahead and ordered a used MCU. After anxiously waiting 5 days, I get the MCU. I plug it in and get the same symptom. F-01 error code, door does not lock, etc... 3- Feeling really stupid for ordering the MCU, I search for wiring diagrams for the CCU trying to narrow down the issue. I found a wiring diagram in document part No. 8540259 (on page 13), which I would attach here but have not figured out how, and used my multi-meter to take some readings. The relay at K1 appears to be closed. If I measure the voltage at the exit of K1 leading to the relay DR1 going into the Locking mechanism (DS3 pin 1) and the IF2 (pin 1) source interface, I get a reading of 120V. However, I don't read 120V at the MS2 (pin 1 and pin 2) that goes toward the MCU. I'm assuming this is because the K2 relay is still open, which I verified that it is open. So one question is, why is K2 still open. What event needs to occur for it to close? I tried to measure VDC voltage across the coils for both K1 and K2 and I don't get a reading. Instead, I get a very low 20-40 mV AC across the gates. Is that expected/normal? Also, I don't measure 120V at DLS3 between pin 1 and pin2, or between DLS3 pin 2 and pin 3. Any ideas why, or what else I can/should be doing to narrow this down further? Note, I have verified that DS2 circuit is working correctly. The washer does detect when the door is open and does not go further when it generates F-01 unless the door is closed. Appreciate any input. I thinking of replacing the K1 and K2 relays. It's a bit of a shot in the dark at this point. I'll probably end-up buying a new washer by the weekend at the rate this is going. A shame to fill the landfill with this big heap of metal just for a few $2.00 components that are failing but unfortunately this is the world we live in. :-(