Chester for Model Number WFW94HEXW0 (FYI: I am an electrical engineer and very good in troubleshooting and repairing things... Can fix almost anything, car - both mechanics and electrical stuff, TV, computer, washers, dryers, irons, you name it....) 1. Washer displayed F06/E01 error. 2. Found MCU with blown components and burnt traces. MCU PN: W10245123 3. With blown MCU Machine would power on and I could get into diagnostics menu with blown MCU or with board unplugged. Pushing Run would lock the door and would not unlock, would not spin and got stuck here. Pulling power cable out would not make difference. Had to unlock door it manually or wait long time for system "reset"? 4. From local repair shops and Sears parts dept found that this board is discontinued and replacement is W10374126. Bought new MCU on Amazon from a reputable company and after it was plugged in - NOTHING worked. NADA. No response to any buttons. DEAD washer. Could not access diagnostics , nothing ..Everything seemed Dead. $200 down the drain. 5 Unplugging new MCU or replacing it with blown one would get me back to same condition as in 3 above. With old blown board I could access diag and reset errors but they would come again on the next try. So it was clear that new MCU is killing the system. 6. Done switching boards and resting errors several times with same effect. Suspected bad MCU - loading or shorting something in the system. Checked wires on MCU, CCU, front Panel, voltages whatever I could. Nothing wrong. Pulled board from the plastic box and inspected. Everything dry, clean and intact... Radiator on motor controller chip was warm so there was power to it. 7. Maybe about 3 hours later I exhausted myself and was pretty much convinced that nothing helps - new MCU is not working and I am done with it. Searched internet if there is something which needs to be done or reset? nothing. Ok, will have to buy CCU or maybe new washer and be done with it. 8. Leaving the laundry room I pressed the last time Power switch and Viola... Washer wake up like nothing happened ... and passed all test and I run the washing cycle .....like new.. And it works since...Wife yelled - don't touch it - don't try to figure out what is wrong...So please tell me what was the the issue that is was dead for few hours and suddenly started to work? One Friend says.. maybe board was moist and Data lines were shorted and dried out... I swear they were dry like a bone. Other says maybe there was contaminant shorting something and fell? Maybe, but I switch it and inspected it so many times.. and in the last cycle from not working to working I kept if flat and connected. and third says maybe it needed to be powered on /of 20 times? LOL That is the most convincing argument. Magic? Anybody seen anything like that?
Answer Chester, While it would be really hard to say the reason that the unit decided to start working, it is possible that there is an issue with the wire harness having a short in it and causing intermittent connection. It is also possible that the connectors on the harness could have had corrosion on it causing it to not make good contact. Taking it off and on several times could have allowed good contact. Read More... Answered by AppliancePartsPros.com | Tuesday, January 30, 2018