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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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Questions & Answers

For LG Micro Switch(primary) (Part Number: AP4437957)

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All the functions of the Micro Wave work except it does not heat the food. The toaster works. Thanks.

Randy J for Model Number 2003 Kenmore Micro Wave & Toaster Model # 721.63293

ANSWER Hello Randy, The things that you would want to check would be the High voltage side of the microwave. Check continuity on the magnetron thermal fuse and the diode. If either are open then replace. Check the magnetron for resistance. .50 ohms would indicate a good reading and check to make sure magnetic is not broken. If broken or magnetron reads open then replace magnetron. Check to make sure that capacitor and transformer are good. 

Answered by AppliancePartsPros.com   |   Tuesday, February 05, 2013

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