Frigidaire Oven Error Code F3 — Oven Temperature Sensor Open / Shorted
What this means
The F3 error code on Frigidaire ovens indicates the temperature sensor (RTD sensor) is sending a reading that is either open circuit (sensor disconnected or broken) or short circuit (sensor shorted). The control board needs a valid sensor reading to regulate oven temperature. Without it, the oven will not heat. A damaged sensor, a loose connector, or damaged wiring between the sensor and the board can cause this code.
Step-by-step fix
4 stepsTest the oven temperature sensor
Turn off the breaker. Locate the temperature sensor at the top rear of the oven interior. Access its wire connector at the back of the oven. Disconnect the wires and measure resistance with a multimeter. At room temperature, the sensor should read approximately 1,080 to 1,100 ohms.
A reading of OL (open line) means the sensor wire is broken. A reading near 0 ohms means it is shorted.
Check the sensor wiring
If the sensor itself reads correctly, check the wires and connector. Look for damaged insulation, bare wire, or loose pins in the connector. Heat damage to the wiring is common near the oven cavity.
Wiggle the wires while watching the multimeter reading. If the reading jumps, you have an intermittent break.
Replace the oven temperature sensor
If the sensor reads open or shorted, replace it. Remove the single mounting screw from inside the oven, pull the sensor out through the back wall, disconnect the wire connector, and install the new sensor.
The sensor is usually held by one or two screws. It takes about 5 minutes to swap once you have access.
Test the oven
Restore power and set the oven to 350 degrees. Verify it heats and holds temperature using a standalone oven thermometer. The F3 code should not return.
If the oven temperature is off by more than 25 degrees after sensor replacement, you may need to calibrate the oven through the control panel settings.
When to call a professional
If the sensor and wiring are both good but the error persists, the control board's sensor input circuit is likely faulty. A technician can evaluate the board.
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.
Learn more about our sourcesParts you may need
Oven Temperature Sensor
Part #316490001 · $12–$25
If the sensor reads open (OL) or shorted (0 ohms)
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