Two years ago my basement flooded with about 5 or 6 inches water and this washer seemed to be OK after that. Then about 1-1/2 weeks ago it flooded again with 10 inches water. This time I think the washer was turning valves on and off while the water was rising, and again when the flood water was going down because I could hear water running.
Since then all the front panel lights seem to behave normally, but when I press Start it just humms quietly for a few seconds and nothing happens. A few seconds later it flashes "do", and sometimes it eventually flashes "FL". I tried to dry it with fans. That didn’t work! There was a lot of other flood damage to deal with, so the motor controller board and discharge pump electronics remained wet about a week until I had time to dry them with a hair dryer.
I’ve taken off the rear, top and front pannels, and ran some of the diagnostics, and here’s the details:
Model (p) MAH5500BWQ
Serial NO. (S) 74793793ZY
Style (Y) Y7909216
Machine Control Board Number: 60C21280302, Software Version: 11
Help Code…Cycles Ago…Service Code…Cycles Ago
…19…0…04…0
…47…0…17…56
…16…2…17…–
…40…2…17…–
…16…3…17…–
…19…3…17…–
…16…5…–
…13…6
…19…10
…–
I do remember some incidents in the past where the door did not lock when it was supposed to. I tried everything that could be done in service mode (without a VOM) but could not make anything happen.
Membrane Pad Check: …Passed
Board Input Test: …Passed, except Fails "Latch Position" test
…(shows "L0" even when I manually trip the switch)
Board Output Test: …Fails everything I can see/hear
Fuse on Motor Control Board: OK
The connector terminals on the Lower Tub Displacement Switch and on the Pressure Switch have a lot of corrosion and thick foam-like mineral deposits on them.
On the Machine Control Board, "R102" gets very hot and has burnt the board around it almost black. Also, "C100" is domed on its top end.
I have basic knowledge of analog and digital electronic circuits and have designed and built some simple gadgets, but no electronic troubleshooting experience. With a little expert guidance I would like to find the bad transistor or whatever if possible. I have been out of work for some time and need to fix this at minimal cost. Please help!
Thanks!