Question about LG Microwave Ovens
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It sounds just like the magnetron is bad, overheating and opening the thermostat. This is how it would work if that were the case.
One other thing is to be sure that the cooling fan is running and that you feel air flow.
You should check the air filter and grille, as well as the outside vent for any blockage.
If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk
You can find helpful exploded view diagrams and order parts by entering your model number here: http://tinyurl.com/gv383
Oct 10, 2007 | GE JVM1190SY/WY/AY/BY Microwave Oven
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