The F2 error on your Ge Microwave means the control board has detected a problem with the oven temperature sensor circuit, usually because the sensor reading is out of the normal expected range. Turning off power to the unit for a few minutes and checking the sensor wiring often resolves this before you need to call for service.

Error code F2
Meaning Oven temperature sensor error — the microwave’s control board is reading a temperature signal that is too high, too low, or missing entirely
Severity Medium — the microwave may still run but heating performance can be affected and the unit may shut off as a safety measure
Time to fix 15–45 minutes
Tools needed Multimeter, screwdriver (Phillips head)

What the F2 error means

Every GE microwave with a convection or bake function relies on a temperature sensor (thermistor) to monitor internal oven temperature. The control board constantly checks the resistance value coming from this sensor. When the reading falls outside the acceptable range — either too hot, too cold, or completely open/shorted — the board triggers the F2 code and typically halts the cooking cycle.

This is a safety feature designed to prevent overheating or inaccurate cooking temperatures. In many cases the issue is a loose connector or a temporary glitch rather than a fully failed part, so a simple power reset is worth trying first.

Common causes

  • Loose or disconnected wiring at the temperature sensor connector
  • A faulty or degraded temperature sensor (thermistor) that no longer reads accurately
  • Moisture or grease buildup around the sensor probe causing a false reading
  • Damaged sensor wiring harness from heat exposure over time
  • A failing main control board that misreads a normal sensor signal
  • A power surge or brief electrical interruption that confused the control logic

How to fix the F2 error

  1. Power cycle the microwave — Unplug the unit or switch off the breaker for 5 minutes, then restore power. This clears many temporary control board glitches.
  2. Check the door seal and close it fully — Make sure the door is latching correctly, as some models will show sensor faults if the door switch signal is inconsistent with the sensor reading.
  3. Inspect the sensor wiring — With power disconnected, remove the outer cabinet panel (or access panel per your model) and check that the sensor connector is firmly seated on the control board.
  4. Test the sensor resistance — Using a multimeter, measure the resistance across the sensor terminals at room temperature and compare it to the manufacturer’s spec sheet for your model. A reading of zero or infinite ohms indicates a failed sensor.
  5. Replace the temperature sensor — If the sensor tests outside spec, order the correct replacement part number for your model and swap it in following the wiring diagram inside the cabinet.
  6. Call an appliance technician — If the sensor tests fine but the F2 code persists, the main control board is likely at fault and should be diagnosed by a professional.

FAQ

Can I keep using my microwave when the F2 code appears?
It’s best to stop using it until resolved, since inaccurate temperature readings can cause uneven cooking or overheating risks.

Will a power reset permanently fix the F2 error?
Sometimes, if it was a one-off glitch. If the code returns after cooking, the sensor or wiring likely needs attention.

Is the temperature sensor expensive to replace?
The part itself is usually inexpensive, but labor costs can add up if you hire a technician instead of doing it yourself.