Question about GE Spacemaker JVM1640SJ Microwave Oven

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No heat microwave runs but doesn't get hot

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It could be a failed magnetron or, if the supply for the magnetron is fused separately (inside), it may be a blown fuse.

If you decide to have it serviced, take it to a recommended shop since, in my experience, the Chinese maggies that one gets are not nearly as powerful as the original was.
A repair shop has to know his parts source well.

Posted on Jul 07, 2008

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see this causes and fix it. GOD BLESS YOU
Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.


High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.


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Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
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