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Customer Questions and Answers for Micro Switch(primary) by LG

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    • Part Number: AP4437957
    • MFG Part Number: 3B73362F
    • Made by: LG
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For LG Micro Switch(primary) (Part Number: AP4437957)

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Microwave light and fan turns on when door is opened. I suspect a switch in the door is malfunctioning? Can you give advice on what switch (primary/secondary) I need? thanks!

Hans for Model Number kenmore microwave 721.66339

ANSWER Hello Hans. You will need to test the switches. NC to COM should read closed and NO to COM should read open. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html 

Answered by AppliancePartsPros.com   |   Thursday, May 16, 2013

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