Frigidaire Oven Error Code F31 — Shorted Temperature Sensor (RTD)
What this means
The F31 error on Frigidaire ovens indicates the RTD temperature sensor has a short circuit — its resistance is abnormally low (near 0 ohms instead of the expected ~1,080 ohms). This tells the control board the oven is extremely hot when it may not be. The oven shuts down heating as a precaution. Causes include a damaged sensor probe, moisture on the sensor connections, or pinched wires touching each other.
Step-by-step fix
3 stepsTest the temperature sensor
Disconnect power. Test the sensor resistance at room temperature. It should read approximately 1,080–1,100 ohms. A reading near 0 ohms confirms a short circuit.
If the reading is normal at the sensor but low at the EOC, the wiring between them has a short.
Inspect for moisture or damage
Check the sensor probe and connector for moisture, corrosion, or physical damage. Also inspect the wiring for areas where the insulation has worn through and bare wires may be touching.
Oven cleaner overspray near the sensor can cause corrosion that leads to shorts.
Replace the sensor or repair wiring
If the sensor is shorted, replace it. If the wiring is damaged, repair the affected section with high-temperature wire and proper connectors.
Use high-temperature wire rated for at least 450°F for any oven wiring repairs.
When to call a professional
If the sensor and wiring test normally but F31 persists, the EOC board sensor circuit is faulty and needs professional attention.
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.
Learn more about our sourcesParts you may need
Oven Temperature Sensor (RTD)
Part #316490003 · $10–$25
If sensor reads near 0 ohms (shorted)
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