When a GE microwave shuts off after a few seconds, the most likely cause is a failing door switch. Inspect each door switch for overheating, arcing, or burned areas, then use a multimeter to test for continuity. Replace any switch that is visibly damaged or tests intermittently. A failing micro switch can cause the same symptom, so check and test each micro switch next. If the switches work correctly, the main control board may be at fault, although control boards are often misdiagnosed. If the microwave runs briefly and only some control panel buttons respond, the touchpad and control panel are more likely defective. A separate touchpad failure is less common, but it can make the microwave stop after a few seconds when the display works and certain buttons do not respond. The control board is another possible cause after the more common parts have been checked. Before opening the outer cabinet, unplug the microwave and use proper safety procedures. The high-voltage capacitor can store a lethal charge even after unplugging, so it must be properly discharged before interior work. If you are not familiar with capacitor discharge, have a qualified technician perform the repair. Enter your GE microwave model number to find the exact replacement part for your appliance.
01 - GE Microwave 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 each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.
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A micro switch might be failing intermittently. Check each of the micro 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.
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.
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.
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.
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.