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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

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For Whirlpool Control Board (Part Number: AP4027450)

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Diagnostic code "nd" come up on LED screen. The drain is not restricted, drain hose is clean, the pump works and all wire connections are good. Is this the control broad that I need?

Jacob for Model Number MAH5500B

ANSWER Hello Jacob. If the unit is giving a ND code, and the pump is working properly, you will need to make sure the pressure switch hose is not clogged, and the pressure switch 22004500 is working properly. Test the green and yellow wires for continuity and also the brown and blue wires. They should read closed for continuity. If either is reading open, you will need to replace the pressure switch. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html 

Answered by AppliancePartsPros.com   |   Friday, February 10, 2012

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