MHWE200XW00 doesn't spin and never completes cycle or diagnostic self-test

[aaronw112358]

we have a MHWE200XW00 washer.  It seems unable to do any spinning and never really 'starts' a cycle, it just locks the door and does nothing else.  I pulled off the cover and found the tech note.  The problem is that the diagnostic cycle acts differently than listed in the tech note.


I push the 1,2,3 buttons and it enters the diagnostic mode with no problems.I then push 2 to enter the self-test mode. The LED displays '1'. I push 2 again, and the LED displays '5'. I push 2 again, the LED displays '0'. I push 2 again, and the door locks (and the LED goes out), I push 2 again, the cold water fills (and then stops). I push 2 again, and I see the drain pump go and the water empties out of the washer. However, no amount of me pushing 2 anymore will change anything else. There aren't any directions to this effect (additional pushing buttons) in the technote - part number W10252711A so I'm not sure what else I need to do to have it to the other parts of the self test.  I pulled off the back cover and checked the tachometer and the drive motor pins and those all seem to have the proper resistance.  I'd love for it to complete a diagnostic cycle so I can have a better idea of what to replace.  Any ideas?

[DaleCaskanette]

sounds like a motor control, pull board and look at board thr capacitors fail top of cap bulges up or plastic sleeve shrinks. could be ccu but we see a lot of this problem and it is normally the mcu

[aaronw112358]

Is the MCU part #15 here:

http://www.appliancepartspros.com/01-top-cabinet-parts-for-maytag-mhwe200xw00.html ?


What's the best way to remove it?  front or back?

[DaleCaskanette]

yes

[aaronw112358]

So I pulled the MCU out of its plastic housing and there was a scorch mark on the housing as well as a smaller burn mark on the circuit board.  I didn't see any bulging caps, but there was definitely an incident of some kind there.  I replaced the MCU and it is working great now.  I also had another question though - the diagnostic test is definitely different than described in the tech note.  I'm trying to correspond with servicematters about this, but I don't want to pay $500 for a subscription just to help them update their docs.  Is anyone with a servicematters.com subscription interested in taking up this matter?

[DaleCaskanette]

they are aware of this issue