What Does Monogram Oven Error Code F3 Mean?
The F3 error code on a Monogram oven or range indicates that the oven temperature sensor (RTD probe) circuit is open — the electrical path through the sensor has been broken. The control board sends a small current through the temperature sensor and expects to measure a specific resistance value. An open circuit means the current finds no path through the sensor, returning infinite resistance. Without a functioning temperature sensor, the oven cannot measure or regulate its internal temperature, making safe cooking impossible.
Common Causes of the F3 Error Code
- Broken or disconnected temperature sensor wiring – The wires connecting the sensor to the control board can break from metal fatigue due to repeated heating and cooling cycles.
- Burned or damaged sensor probe – The metal probe can be physically damaged from contact with heavy cookware.
- Failed temperature sensor – The RTD sensor element inside the probe can fail and develop an open circuit from thermal stress over years of high-temperature operation.
How to Troubleshoot the F3 Error Code
- Reset the oven – Turn off the breaker for 60 seconds and retry. Confirm F3 returns before proceeding.
- Inspect the sensor probe – Look at the sensor probe mounted on the rear upper wall inside the oven cavity for visible damage.
- Test sensor resistance – A technician can test the sensor with a multimeter. A properly functioning Monogram oven RTD sensor reads approximately 1100 ohms at room temperature. Infinite resistance confirms an open circuit.
When to Call a Professional
Contact our Monogram oven repair team for professional diagnosis and temperature sensor replacement using factory-certified Monogram parts.