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- > Do-It-Yourself Appliance Repair Help > The Laundry Appliance Repair Forum > Whirlpool Duet HT WFW9400SZ Washer Error

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Whirlpool Duet HT WFW9400SZ Washer Error  Rate Topic 
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 Posted: Tue Oct 12th, 2010 07:19 pm
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felixw
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My washer is just less than 3 years old and first time having problems.  A week ago, when I try to start the wash cycle, the washer does not start up.  All it did was dig 3 times.  So I tried unplug and replug the power.  This time, the the control panel does not repond.  When I press power, all it did was ding 3 times.  Nothing lights up.  I tried unplugging overnight and replug, and also tried cleaning out the drain filter, but nothing worked.  After paying over $100 for repairman to come and tell me that it might be the circuit board and that it's probably not worth fixing, i banged on the machine and it worked.  However, it worked for 3 wash cycles and lasted just 1 week.  Now, same problem... Can someone help me and let me know the proper way to fix it.

Thanks.

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 Posted: Tue Oct 12th, 2010 08:43 pm
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Tronicsmasta



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this happens on your model when the DC voltage isn't high enough to power the interface.

only perform this test when the symptom happens.
open the bottom kick panel. 3 7mm or 1/4in screws or torx 20 depending on the model. on the left will be your motor control unit. open the little cover that covers the wires and disconnect the 3 blue wire connector from the motor control. if you have a handy dandy multimeter, take a DC voltage measurement between the outer 2 most pins. pins 1 and 3. you should see 5v DC. keep it disconnected and try to power up again. if the console starts working, your MCU has a DC short.

I have replaced about 5 motor controls this year for that problem. its one of those problems that don't come along very often and you can't get into diagnostics to see the error if there is one... and no error is displayed. we found this out by calling into whirlpool tech line with my tech department....

fyi for other servicers here :)



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It is never a bad thing to leave it to the professionals. Inexperience can lead to more damage or risk of injury. You can always call A&E Factory Service (1-800-905-9505), Sears(1-800-469-4663), or local service man you can trust (servicemagic.com).
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 Posted: Tue Oct 12th, 2010 09:05 pm
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felixw
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Thanks... I'll test it out tonight.  If it is the MCU, can you please tell me what the part number is for unit?  And how easily can this be replaced?

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 Posted: Wed Oct 13th, 2010 12:19 am
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appl.tech.29501
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MCU MFG.Part# 8183196

Repair Clinic Part # 1257029

MCU Link




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 Posted: Wed Oct 13th, 2010 05:19 am
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Tronicsmasta



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Oh its very easy... IF its the mcu... double and triple check :)

3 screws on the bottom front kick panel. remove the panel. open the MCU cover. Disconnect the 3 sets of wires. clip the zip tie harness mounts. there will be a tab on the front right side of the MCU right where it meets the bottom panel. lift this tab and slide it forward. and remove...

replace...

then drink a beer and watch your machine work..

btw, RepairClinic will allow you to return the MCU if it does not fix your issue :)



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It is never a bad thing to leave it to the professionals. Inexperience can lead to more damage or risk of injury. You can always call A&E Factory Service (1-800-905-9505), Sears(1-800-469-4663), or local service man you can trust (servicemagic.com).
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 Posted: Thu Oct 14th, 2010 02:32 pm
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felixw
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Thanks for the info.  Unfortunately, I live in Canada and Repair Clinic does not ship internationally.  Do you know if any place in Canada that I can order and have the return option?

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 Posted: Thu Oct 14th, 2010 03:23 pm
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felixw
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I tried that unplugging the 3 blue wire, and bang, the machine lights up.  So I guess it is the MCU that's toast.... Since I can't find a place that's refundable in Canada, how certain can you say it is the MCU that is causing the problem?  I am just afraid to buy a $400 part and then throw to waste if the machine still doesn't work.  Thanks for all the help.

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 Posted: Thu Oct 14th, 2010 06:42 pm
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felixw
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Many places says Return only if the part has never been installed or plugged in. Can they tell if the MCU's been plugged in or not?

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 Posted: Thu Oct 14th, 2010 06:46 pm
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RegUS_PatOff
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it may be in a sealed box ...



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 Posted: Thu Oct 14th, 2010 07:12 pm
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felixw
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But the policy says No return on "Installed electrical or electronic parts"... opening the box does not represent installed... thoughts?

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 Posted: Fri Oct 15th, 2010 02:13 am
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Tronicsmasta



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they loook for marks on the spade connectors. once you plug in the 2 pink wires, it scratches the surface and if you hold it at an angle, you can see the marks. after unplugging the 3 blue wires to the mcu, and your lights lit up... id say 100% its your mcu :)



____________________
It is never a bad thing to leave it to the professionals. Inexperience can lead to more damage or risk of injury. You can always call A&E Factory Service (1-800-905-9505), Sears(1-800-469-4663), or local service man you can trust (servicemagic.com).
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 Posted: Tue Oct 19th, 2010 01:22 pm
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felixw
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My part finally arrived yesterday. Just before I open the box to install it, I did one last test and unplug and replug the machine... and what do you know... it powers up, and I was able to get a load of laundry done.. so what the heck is going on??? I really don't know if I should still replace the MCU now or not.. last time it came back to live, it survived for 1 week and died again... any suggestions???

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