Question about Whirlpool MH2155XP Microwave Oven
If your Oven does not heat, it only means that your microwave "magnetron"
is not working. Try to look for a busted fuse if all the fuses are ok
maybe the magnetron it self is defective.
When you run a microwave oven without any food inside, there is nothing to absorb the microwaves and they build up inside the cooking chamber. Eventually, something has to absorb them and that something is the oven's microwave source—its magnetron. The magnetron isn't good at handling excessive power that returns to it from the cooking chamber and it can be damaged as a result.
From comment to other experts of experimenting with microwave ovens, have only killed a magnetron once. But then again, I haven't run a microwave oven for more than a minute or two without anything inside it. If the oven works again after cooling down, then you're probably OK. The oven may have thermal interlocks in its microwave source to prevent that source from overheating and becoming a fire hazard. If the oven fails to work after an hour of cooling off, then you're probably out of luck. The magnetron and/or its power supply are likely to be fried and in need of replacement.
Also, check the fuse (generally 20AMP), the Transformer and the High Voltage capacitor.
Posted on May 05, 2010
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Posted on Jan 02, 2017
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