Question about Whirlpool MH7140XF Microwave Oven

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No heat but everything else works

WE have a Whirlpool MH2175XSS0 over the range microwave. It quit heating, everything else worked, about a month ago. Got an Ohm meter and tested all the parts and the diode tested bad. Replaced the diode and it worked fine. Now, about a month later, with light use, the microwave has quit heating again. We have not tested anything but were wondering, if it is the diode again, could something be causing the diode to go bad? The magetron tested good before as well as the capacitor. Sharon Bean

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Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing.

There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


Benjamin

Posted on Apr 26, 2009

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