Microwave error codes

F1 means the thermal sensor reads open, usually because the cavity got too hot. The usual causes are a failed thermal sensor, a cooling fan that isn't running, or the control board.

F2 means the thermal sensor is shorted. The usual causes are the sensor itself, its wiring, or the control board.

F3 means the touchpad is shorted: a button reads as stuck. The usual causes are a failed touchpad, moisture behind it, or the control board.

F4 means the humidity sensor reads open; F5 means it's shorted. The usual causes are a failed humidity sensor, its wiring, or the control board.

On a sensor cooking program, it means the microwave couldn't detect steam from the food, often because the food was covered tightly or too small. If it shows on every program, the usual causes are a failed humidity sensor or the control board.

LOCKED isn't a fault: the Child Lock is on. Press and hold Clear/Off (or the Lock button on some models) for about 3 seconds to unlock.

F5 E3 points to the door latch circuit. The usual causes are a failed door latch switch, a broken door hook, or the wiring to the control board.

F1 codes (such as F1 E0) point to the control: the microwave's control board or touchpad isn't working properly. The usual causes are a failed control board, a failed touchpad, or the wiring between them.

"Door" (or "Open/Close door") means the microwave doesn't see the door as closed. On some Maytag models it's a two-step door-opening setting. Otherwise, the usual causes are a failed door switch, a broken door hook, or a misaligned door.