What Does Monogram Oven Error Code F4 Mean?
The F4 error code on a Monogram oven or range indicates that the oven temperature sensor (RTD probe) circuit is shorted. The control board is reading an abnormally low resistance from the sensor, which typically means the sensor is reading a falsely high temperature or has experienced an internal short circuit.
Common Causes
- Failed oven temperature sensor (shorted internally) – The resistance element inside the probe has shorted, causing it to read a very low resistance value.
- Pinched sensor wiring (wires touching) – The two sensor wires have been pinched together, creating a short circuit and a false low-resistance reading.
- Moisture or grease ingress into the sensor connector – Liquid or conductive grease between the sensor connector pins can simulate a short circuit.
How to Troubleshoot F4
- Hard reset – Turn off the circuit breaker for 5 minutes and restore power.
- Inspect the sensor wiring – With power off, trace the sensor wiring from the probe to the control board connection. Look for pinched, melted, or burned sections where the wires may be touching.
- Test the sensor resistance – At room temperature the RTD probe should read approximately 1080–1100 ohms. A very low reading (near zero) on a multimeter confirms an internal short in the sensor.
- Dry the connector – If grease or moisture is present in the connector, clean and dry thoroughly before retesting.
When to Call a Professional
If the sensor or its wiring has failed, call 844-752-7887 for certified Monogram oven repair using genuine parts.