GE · Microwave error code

F10Shorted touch panel

Single source High-voltage / caution

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

Related diagnostic guides

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Over-the-range microwave vent fan turns on by itself or won't turn off

Most OTR microwaves have a heat-protection thermostat that starts the vent fan when the cooktop below heats the unit, and on that cycle the fan cannot be switched off until the area cools. Some models also run the fan during and after microwave cooking or link the hood to the cooktop. If the fan runs in a cool kitchen, right at power-up, or for hours, suspect a thermostat stuck closed, a welded fan relay on the control board, a stuck vent key or a shorted wire.

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Rule out control lock first. Then the usual causes are a worn or moisture-damaged membrane keypad or a loose ribbon at the control board. Unplugging the keypad ribbon separates a bad keypad from a bad board. The control board sits next to high-voltage parts on most models.

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Microwave starts by itself or will not stop

A microwave that heats on its own is a fire hazard: unplug it and do not use it. The usual cause is a stuck relay or shorted triac on the control. On OTR units, a fan that starts by itself is often normal heat protection, and a light that stays on can be moisture.

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