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Microwave not heating

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Brand:Sharp
Model:R1500
Product:Microwave
Thumbnail for video "Microwave Not Heating? Microwave Oven Troubleshooting"
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Microwave Not Heating? Microwave Oven Troubleshooting

04:04

Common solutions for: Microwave not heating

01 - Door Switch
Most microwaves have three or four door switches. When the microwave door closes, the door switches actuate in sequence to ensure that the door is closed properly. If any of the door switches fails, the microwave will not start or heat. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches does not have continuity, replace it. (Caution: The microwave oven can store thousands of volts of electricity in its... high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace a door switch.)
Top Solution
02 - Main Control Board
The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—before replacing the control board, check all of the more commonly defective parts. If you have determined that all of the other components are working properly, replace the main control board. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric sho...ck, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the main control board.)
Uncommon But Possible