Repair and disassembly guides for GE Microwave ovens.

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GE spacemaker microwave works intermittently?

Sometimes it works, sometimes it doesn't and occasionally will stop mid-operation. When it does stop midst cycle, there is a low hum, but no heat, no light, no turntable turning.

If the light does not go on when we open the door, the unit will not work.

We push on the turntable, push different buttons, open and close door....eventually it will start again.

Other times it starts right up like it should.

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Door Switch

If the microwave runs for a few seconds and then shuts off, a door switch might have failed intermittently. Check each of the door switches for any signs of overheating, arcing, or burning. Also check each of them for continuity. Replace any of the switches that is visibly damaged or that only has continuity intermittently.

Main Control Board

If the microwave runs for a few seconds and stops there may be a short circuit in the main control board. Check other components first, these boards are often misdiagnosed.

Touchpad and Control Panel

If the microwave runs for a few seconds and stops the touchpad and control panel might be defective. There are several other components that can cause this problem, be sure to check any other components before replacing this board.

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.

High Voltage Transformer

If the microwave runs for a few seconds and stops the high voltage transformer might have an intermittent short. This is not common. Check other components related to the microwave symptom first.

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.

Thermostat

If the microwave runs for a few seconds and stops the thermostat might be defective.

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