Bottom Line Up Front (BLUF) as we say in the military: Does anyone have schematics or a parts list for this motor controller board? I'd like to replace a burned out component.

Our Whirlpool Duet HE (WFW9200SQ00) washing machine stopped working with the F28 error indicating a serial communication failure between the central controller and the motor controller. The machine is three years old.

I bought a new central controller (part #8183258, $234, ugh), but that wasn't the problem (anyone want to buy it off me at a discount?).

When I took the motor controller board out, I saw that two traces on the circuit board were burned off, or rather, one was burned off, and the other was on its way out the door. You can see where I'd begun scratching off the green in order to repair the traces.



Those traces I easily soldered over thinking they may have shorted out due to water dripping over them or something.

I plugged it all back in and turned on the washer. [COLOR="DarkRed"]Poof![/COLOR] Smoke and lights.

Upon removing the motor controller I had two new bad traces (it's like whack-a-mole), and I noticed a bad over current/voltage component -- at least I think that's what the component is called.





I can't be certain that the component wasn't bad the first time too; when I finally noticed the bad component, I'd been studying the board for an hour or more and hadn't noticed it in all that time. It's possible that I missed it before, even though I know I looked intently at the component the first time.

Whatever the component is, it measures 84 ohms across the leads. Also, the two capacitors measure about 275 microfarads (they're labeled as 1000 microfarads), but I don't know if that's a reliable reading, measuring a capacitor when it's connected to other components.

So now I'm wondering what the component is so that I can replace it. Does anyone have that information? The tech manual I have doesn't list circuit board schematics, only inter-board schematics.

The component has two leads and looks like a standing circle. It reads NTC 60. There are more numbers that end in "...35," but the beginning is blown away.

Of course the problem may still lie outside the board, and even if I replaced the entire board (at $250!) I may just fry that. I've confirmed that the motor windings give the proper 6 ohm resistance, and tonight I'll confirm that none of the motor leads are shorted to ground.

Thanks.

-Rob

The component is a metal oxide varistor (MOV) and is normally open in the circuit. It fails closed, and in my case it measured about 80Ω. I replaced the MOV, and the board didn't work.

I investigated further and discovered that the rectifier was also bad. I ordered a new one from Digikey and replaced it. Still broken. Sigh.

-Rob

I know this thread is 5 years old...But was wondering if rharder is back in business?
I have same Model wfw9200sq00 whirlpool front load washer.
When I hit power button all I get is 3 dings. Nothing else. No lights. Nothing.
Was told (with out a tech physically present) that the Motor Control Board was out.
Thanks in advance,
WvChamp.