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Whirlpool Microwave Shuts Off After a Few Seconds

MH1150XMS3

The part(s) or condition(s) listed below for the symptom Microwave shuts off after a few seconds are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Microwave shuts off after a few seconds

Cause 1Door 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 each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.

Part Testing
Parts
Door Switch for your WhirlpoolMicrowave
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Cause 2Door 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 each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.

Part Testing
Parts
Door Switch for your WhirlpoolMicrowave
Door Switch - Part # 1472224 Mfg Part # W10211972
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Cause 3Door 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 each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.

Part Testing
Parts
Door Switch for your WhirlpoolMicrowave
Door Switch - Part # 1472225 Mfg Part # W10211973
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Cause 4Main 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.

Parts
Main Control Board for your WhirlpoolMicrowave
Cause 5Touchpad 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 and control panel.

Parts
Touchpad and Control Panel for your WhirlpoolMicrowave
Touchpad and Control Panel - Part # 961201 Mfg Part # 8185286

Control panel with touchpad, white

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Cause 6Touchpad 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 and control panel.

Parts
Touchpad and Control Panel for your WhirlpoolMicrowave
Touchpad and Control Panel - Part # 961202 Mfg Part # 8185287

Touchpad and control panel, black

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Cause 7Touchpad 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 and control panel.

Parts
Touchpad and Control Panel for your WhirlpoolMicrowave
Touchpad and Control Panel - Part # 1027640 Mfg Part # 8205031

Touchpad and control panel assembly, stainless and black

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Cause 8High 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 burning 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.)

Parts
High Voltage Transformer for your WhirlpoolMicrowave
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Cause 9Thermoprotector

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.

Parts
Thermoprotector for your WhirlpoolMicrowave
Cause 10Thermostat

If the microwave runs for a few seconds and stops the thermostat might be defective. Watch our video on testing thermostats.

Parts
Thermostat for your WhirlpoolMicrowave
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