GE Microwave Error Code F2

The F2 code on a GE microwave means the control board has detected a shorted circuit in the oven cavity thermistor, which is the internal temperature sensor. The board reads a resistance value that is abnormally low, consistent with a short, and shuts the unit down as a protective measure. This code points to a problem with the thermistor itself, its wiring, or in some cases the control board.

You should not use the microwave while the F2 code is active. The thermistor provides temperature feedback that the control board relies on to operate safely, and a shorted sensor means that protection is compromised. Continued use without a functioning temperature sensor could lead to overheating or further component damage.

Repair costs vary depending on what component is at fault. A replacement thermistor is generally an inexpensive part, typically in the range of $10 to $40, and is a straightforward repair for someone comfortable working on appliances. If the control board is the source of the fault, board replacement can range from $80 to $200 or more for parts alone. Professional labor will add additional cost to either repair.

Unplugging the microwave for a few minutes and restoring power may temporarily clear the F2 code, but if the underlying fault in the thermistor circuit remains, the code will return. A reset is useful for confirming whether the error is intermittent or persistent, but it does not repair the shorted component. A proper repair requires diagnosing and correcting the thermistor circuit fault.

Start by unplugging the microwave and locating the oven cavity thermistor inside the unit. Use a multimeter to measure the thermistor's resistance and compare it to the expected range. If the resistance reads near zero ohms, the thermistor has shorted and needs replacement. Also inspect the wiring harness and connectors leading from the thermistor to the control board for any signs of damage, melting, or corrosion.