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Customer Questions and Answers for Control Board by Whirlpool

    • Part Number: AP4027450
    • MFG Part Number: 22004488
    • Made by: Whirlpool
    • Not Available

Questions & Answers

For Whirlpool Control Board (Part Number: AP4027450)

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When the washer is started, it runs fine until it gets to rinse or spin on a medium to heavy load. It then stops and we get an lr signal. When we turn the power off and let the machine control cool (it has an area on the upper right corner of the machine control which heats up during operation), the washer will complete its cycle. I have mounted a small fan outside the rear of the control panel and it blows on the control panel--this helps on small loads. Also, I have the machine on a surge protector which we turn off when we complete our loads; otherwise the machine control continues to stay warm. Do I need to replace the machine control or the assembly motor control?

Berry for Model Number MAH5500BWW

ANSWER Berry, You most likely have an issue with the motor control board 22004473 (depending on serial number).It is normal for the control panel to get "warm" There is a transformer mounted to the Machine control board 22004488 (depending on serial number) that is "active" as long as there is power supplied to the washer, it will get warm. The "LR" code in short means the machine control board, is not "seeing" the motor run, quite often this is due to a weak or loose connection at the JP4 connector on the motor control board, or the P2 connector on the machine control board. To diagnose the issue, you'll need a multimeter that reads DCV and check for 0 to 5 VDC acroos the yellow(pin#1) and blue(pin#3) on the P2 connector while the washer is in a agitate mode. Then check for an increase in DCV across the same wires in the spin cycle(voltage will increase to 20-24 VDC then reduce down to approximately 12 VDC when the machine reaces the full spin speed). If you check and do not have any loose connections, the approximate voltages are present at the P2 connector, then the machine control board is at fault. If you do not have the voltages, then the motor control board is at fault. 

Answered by AppliancePartsPros.com   |   Wednesday, October 17, 2012

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