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Microwave shuts off after a few seconds

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Common solutions for: Microwave shuts off after a few seconds
Solution 1:
Door Switch
A door switch might be failing intermittently. Check each of the door switches for signs of overheating, arcing, or burning. If you don’t see any obvious signs of failure, use a multimeter to test eac...h switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.
Required Part
Oven/Microwave Combo Door Switch
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Solution 2:
Main Control Board
Control boards are often misdiagnosed—before replacing the control board, first check more commonly defective parts, particularly the door switches. If all of the other components are working properly..., replace the control board.
Required Part
Oven/Microwave Combo Main Control Board
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Solution 3:
Touchpad
If the microwave runs for a few seconds and stops the touchpad might be at fault. This is not common. Generally speaking, if the microwave display is working and some of the buttons respond correctly ...but some don’t, the problem is with the touchpad.
Required Part
Oven/Microwave Combo Touchpad
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Solution 4:
Touchpad and Control Panel
To determine if the touchpad and control panel are defective, try pressing each of the buttons on the control panel. If some of the buttons respond correctly while others don’t, replace the touchpad a...nd control panel.
Required Part
Oven/Microwave Combo Touchpad and Control Panel
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Solution 5:
High Voltage Transformer
Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails, it will usually arc and have a b...urning smell. (Warning: The microwave oven can store a lethal amount of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the high running voltage and the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the high voltage transformer.)
Required Part
Oven/Microwave Combo High Voltage Transformer
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Solution 6:
Thermoprotector
If the microwave runs for a few seconds and stops 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.
Required Part
Oven/Microwave Combo Thermoprotector
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Solution 7:
Thermostat
If the microwave runs for a few seconds and stops the thermostat might be defective. Watch our video on testing thermostats....
Required Part
Oven/Microwave Combo Thermostat
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