Microwave not heating problems when the timer/controller board appears to function properly, are related to the following components -
1) Diode
2) Capacitor
3) Transformer
4) Magnetron
SOURCE: Microwave lights up plate turns something hums
Sounds pretty normal but the inside is not supposed to get hot - only the food is.
Try heating a half glass of water for 1 minute if it gets hot... its working - if not then the actual microwave generating device inside has probably died.
In that case buy a new microwave oven as the cost of parts and labour to repair is usually more than cost of buying a new one.,
SOURCE: Microwave Model JVM 1870 stopped heating, all else works (timer)
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heatman101
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Yea, same issue. A technician will look at it but my personal guess is that it is a circuitboard issue.
Without warning, heard large crack sound after putting in microwave safe dish with pasta. When attempted to reheat, sound was more of humming, & no heating was taking place.
Definitely need service, but question is can unit be repaired w/o pulling out from wall, as have granite siding below unit that prevents easy & quick removal from wall.
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