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GE Microwave won't turn off

If your GE microwave won't turn off, keeps running, or the fan won't shut off after you press Cancel or open the door, start with the door switch. A failed or shorted primary, secondary, or monitor door switch can keep the microwave operating, and a door switch problem may also let the fan run when the door is open. Next, check the user control and display board if none of the control panel buttons respond correctly. If some buttons work but the Cancel or Off button does not, the touchpad and control panel or touchpad is more likely defective. A failed main control board is less common, but a shorted relay or triac can continue supplying power and leave the microwave stuck on. Test door switches for continuity with a multimeter, and replace the defective part with the correct GE component. Enter your model number to find the exact replacement part for your specific microwave. Any repair requiring removal of the outer cabinet involves a high-voltage capacitor that stores lethal charge even after the microwave is unplugged. It must be properly discharged before interior work, so use a qualified technician if you are not familiar with capacitor discharge procedures.

01 - GE Microwave 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 fail, the microwave will not start or heat. In some rare cases a door switch may short out and allow the fan to run even when the door is opened. 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 lack continuity, replace the switch. (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.)
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Top Solution

02 - GE Microwave User Control and Display Board

The cancel or off button on the user control and display board may not be activating. To determine if the control and display board is defective, try pressing each of the buttons on the control panel. If none of the buttons are responding correctly, replace the user control and display board.
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Highly Likely

03 - GE Microwave Touchpad and Control Panel

The cancel or off button on the control panel may not be activating when it's pressed. 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.
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Common

04 - GE Microwave Touchpad

The cancel or off button on the touchpad may not be activating. To determine if the touchpad is 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.
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Common

05 - GE Microwave Main Control Board

The main control board has relays that send power to several components to make the microwave work. If one or more of the relays or triacs short out, some of the components can keep running when the controls are turned off. (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 the main control board.)
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Common

06 - GE Microwave Control Board

The control board has relays that send power to several components to make the microwave work. If one or more of the relays or triacs short out, some of the components can keep running when the controls are turned off. While you can often replace just the control board, some microwave models sell control panels as an assembly with both the touchpad and control board included.
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Uncommon But Possible

Frequently Asked Questions

Why won't my GE microwave turn off?
What should I do if my microwave turns on by itself or runs with the door open?
How do I test a GE microwave door switch with a multimeter?
Why do some GE microwave buttons work while the Cancel or Off button does not?
How do I find the correct GE microwave control board or door switch?

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