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Maytag Over-the-range microwave runs but does not heat Model MMV4205BA. Light works, turntable works, timer works. But no heat

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Please remove the cover and check the door safety interlock switches. Check with a contunity checker or a volt ohm meter.

What happens is thjis: when the oven is running ane you open the door, the tiny contacts in these little swirtches arc and burn. Eventually, the switches fail. When this happens, the oven doesn't know the door is closed. When The door is open, the oven will not turn on the magnatron. No magnatron, no heat.

It could be the start capacitor, but not likely compared to the switches. Dont try to service the capacitor unless and until you understand the danger.

Thanks for posting your question at FixYa.com - please vote.

Thanks

a

Posted on Nov 14, 2009

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