GE Oven Error Code F3 — Open Oven Temperature Sensor
What this means
The F3 error code on GE ovens indicates that the oven temperature sensor (RTD) has an open circuit. The control board reads infinite resistance from the sensor, meaning the sensor wire is broken, the connector is loose, or the sensor itself has failed. Without temperature feedback, the oven cannot regulate heat and will not operate.
Step-by-step fix
4 stepsPower cycle the oven
Turn off the breaker for 2 minutes, then restore power. If the code clears and doesn't return, it was a loose connection that reseated itself.
Locate and test the temperature sensor
Unplug the oven. The RTD sensor is a metal probe extending into the oven cavity, usually mounted on the back wall. Disconnect the sensor wires at the control board connector and measure resistance. At room temperature, it should read approximately 1,080–1,100 ohms. An infinite (OL) reading confirms an open circuit.
Test at both the sensor end and the board end to determine if the sensor or the wiring is the problem.
Inspect the wiring
Check the wire harness running from the sensor to the control board for any breaks, pinch points, or burn marks. Repair or replace damaged wiring.
Wires near the oven cavity can degrade over time from heat exposure.
Replace the oven temperature sensor
If the sensor reads open (OL/infinity), replace it. Remove the mounting screws inside the oven, pull the old sensor out, feed the new one in, and reconnect. Test the oven at 350°F.
GE oven temperature sensors are inexpensive and one of the most common oven repairs.
When to call a professional
If the sensor and wiring both test good but the F3 code persists, the control board's input circuit may be faulty. A technician should diagnose the board.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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