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Somewhat random behavior of a Maytag Washer MHW8200FC0 Control Panel

DDpiner

Premium Member
Joined
Sep 24, 2022
Messages
4
Location
California
Model Number
MHW8200FC0
Brand
Maytag
Age
1-5 years
I know others have posted about this issue with other models....and I know the common response is to replace the UI board. But I started there (new module from appliance supplier), worked for about 2 weeks then the same behavior returned. So naturally I replaced the ACU board (new module from appliance supplier). No effect. So I'm really scratching my head now.

Background Info

Symptoms: Random control panel actions; initiates "button" inputs on its own; unresponsive to many user button inputs; randomly turns on; randomly turns off; won't turn on manually with power button; only turns on manually with knob turns; sing-songy control panel behavior
Fault codes: None
Maintenance done: Replaced UI and ACU, verified that no connectors are loose/improperly installed; checked door switch to make sure nothing appeared wrong; System reset is ineffective as well
Testing done: User interface test: All lights illuminated; two buttons were unresponsive => Delay Hours and Extra Rinse (note: two buttons that I never use so it shouldn't be wear related); one of the buttons beeps without responding (Extra Rinse if I recall correctly) and the other doesn't beep or respond.
Physical observations: Nothing visual appeared to be wrong with either board (no obvious damage or physical defects).

Skill level
I'm not a repair person, just a mechanical engineer with 30 years of experience. Not a sparky though. I feel for you repair folks. The connectors on these things are a PITA to remove and install. I get that they are locking type, but man are those difficult to access and unlock. Bloodied my finger trying to release that ACU module from the chassis too. You have push it right into a sharp sheet metal support while keeping your finger on a nearby snap feature. Jeez. Got more than I bargained for on this project.

Any ideas? Thanks.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
135,946
Location
Vicksburg Junction, Arizona
Hi,

Here's the UI Board for your model:

Testing done: User interface test: All lights illuminated; two buttons were unresponsive => Delay Hours and Extra Rinse (note: two buttons that I never use so it shouldn't be wear related); one of the buttons beeps without responding (Extra Rinse if I recall correctly) and the other doesn't beep or respond.

It worked good for 2 weeks after you replaced it? Where did you get it from, sounds like its possibly faulty, it should have a warranty on it from the place you got it at, did you contact them and ask them to send another new one?

If all your wiring to the UI Board is good, secure, and tight and no metal pins are bent OR backing out, then the UI Board is likely faulty.

I'm attaching your tech data sheet below, look on page 15.

Page 15--->Some buttons do not light indicators:
1. Unplug washer or disconnect power.
2. Remove the top panel to access the ACU and User Interface (UI).
3. Visually check that the UI and housing assembly is properly inserted into the front console.
4. If visual check passes, replace the UI and housing assembly.
5. Reassemble all parts and panels.
6. Plug in washer or reconnect power.
7. Perform the “User Interface Test” (see page 5) to verify repair.

Jake
 

Attachments

  • tech-sheet-W10775510-RevA.pdf
    4 MB · Views: 45

DDpiner

Premium Member
Joined
Sep 24, 2022
Messages
4
Location
California
Hi Jake. I don't understand. Are you saying that I should replace it again because my original replacement was a dud?
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
135,946
Location
Vicksburg Junction, Arizona
That's what I'm saying, why would it work 2 weeks after you replaced it, then fail again now?

Where did you buy it at? If you got it from a reputable appliance supplier, they should have a warranty on it, just contact them for another new one.

AppliancePartsPros and RepairClinic Always has a 365 day warranty on ALL parts.

Jake
 

DDpiner

Premium Member
Joined
Sep 24, 2022
Messages
4
Location
California
Ok. Going on your instinct that I got two bad UI boards (original and replacement). Looks like Genuine Replacement Parts is going to honor the warranty, as you expected. I'll report back after I get the replacement. It's a newer model so others might come looking for info on this one in the near future.
Thanks.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
135,946
Location
Vicksburg Junction, Arizona
Yes, that has to be the reason, thanks for the update!

Jake
 

DDpiner

Premium Member
Joined
Sep 24, 2022
Messages
4
Location
California
Ok. Genuine Replacement Parts refunded my User Interface Board instead of replacing it, as originally requested. Not sure why. I'm assuming there is a recurring issue with these boards. So I decided to cut my loses and scrap the whole washer.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
135,946
Location
Vicksburg Junction, Arizona
Thanks for the update!

Jake
 
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