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WDC

Member Since 16 Apr 2012
Offline Last Active Apr 18 2012 06:40 PM

Topics I've Started

Maytag Neptune MAH3000AWW Reoccurring PCB (control board ) trace burning

18 April 2012 - 12:15 PM

Maytag Neptune MAH3000AWW Reoccurring PCB (control board ) trace burning.

I am having a reoccurring PCB problem, same symptoms six mouths apart and need help or advice from others having the same problem.

Neptune
Model: MAH3000AWW
Serial # 18110467SW
Original Control Board 6 2707690 (new Board-22002988)

Symptoms:
1- The machine starts overfilling and water running out the front door
2- it appears water is continually running and will not turned off during the cycles (stops when unplugging the power
3- we have noticed the machine running hot or warm water when in the cold setting
4- Electrical burning smell is noticed that turns out to be an overheated trace on the back of the PCB

History: six months ago the washer stopped working PCB showing signs of overheating/shorting on the back side of the PCB opposite of P4 on front side. Not knowing exactly what caused the problem, I replace the following:

PCB - new
Timer dial- used
Washer Push Button Switches (all of them) used
Door latch wax-motor-new
drum bearing and seal was changed out 1 1/2 years ago (easy repair for such a common problem)

After these changes the machine worked fine for 6 months but has now have just experienced the same short and burns on the back of the PCB. I have removed the motor controller inspecting it closely and there are no burn or heat marks anywhere, it looks fine.

I have performed the following test and each one has tested fine as described in the service manual troubleshooting guide:

Drive System Diagnostics Test
Drive Systems Phase Loss Test
drive system Phase Continuity Test

I am now at a loss any help or recommendations would be greatly appreciated,

Thanks in advance,

Will- wdc@cherringtongroup.com


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