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GE Microwave Doesn't Heat

JVM140001

The 3 most common part(s) or condition(s) which cause the symptom Microwave doesn't heat are listed below starting with the most likely. Check or test each item and watch any available videos.

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Diode - Part # 254740 Mfg Part # WB27X1160

Diode

RepairClinic Item # 254740

The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven. A regular meter with a diode checker will not work to check these diodes. You have to use a meter with a 9 volt battery or put a 9 volt battery in series with the diode to check it.

$61.35

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365 Day Return Policy

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Magnetron - Part # 769966 Mfg Part # WB27X10249

Magnetron

RepairClinic Item # 769966

If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.

$200.70

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365 Day Return Policy

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Thermoprotector - Part # 963800 Mfg Part # WB27X10664

Thermoprotector

RepairClinic Item # 963800

If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

 

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