KENMORE ELITE: Hums and inside heats up when closing the door.


Microwave Repair

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Hello Everyone, I have Kenmore 72167909601 model which started acting weird from last night. While heating the food all of

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Appliance Repair Forum > Appliance Repair Help > Microwave Repair » KENMORE ELITE: Hums and inside heats up when closing the door.

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Old 11-18-2017, 12:14 PM
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Smile KENMORE ELITE: Hums and inside heats up when closing the door.
Model Number: 72167909601   Brand: Kenmore   Age: 5 - 10 years   

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Hello Everyone,

I have Kenmore 72167909601 model which started acting weird from last night. While heating the food all of a sudden, when i closed the door it started making humming sound...and also observed upper, side walls are getting warm/hot.

I unplugged and switched off the unit. called kenmore and they said we will come in for $249+parts & labour. Not worth it.

Tried to plug it back and closed the door. Same humming sound. Display panels are working. Tried to heat water for 30 seconds and it worked fine. But humming sound continued. Left a glass of water and closed the door... humming sound continued and within a min my glass of water is heated without selecting any timer...

I see few recommendations like changing the door interlock switch. I opened the microwave and see two interlock switches... when i press it, i am able to hear the click sound. But i am not sure changing that would fix the issue. I am hearing the humming sound coming from either magnetron or HV Transformer.

I know that repairing microwave is very dangerous. But if something is simple i would like to try...

I really appreciate if anyone have a suggestion.

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Old 11-19-2017, 04:03 PM
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I'd bet you have a stuck relay (the contacts inside are welded together)

There are two relays that handle high amp draw on this board. One or both are damaged. You would need to check them with a meter.

The relays are just above the transformer on the lower right side of the board.
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