Monogram Range Error Code F3 or F4

The F3 or F4 error code on a Monogram range indicates that the oven temperature sensor (RTD) is open or shorted. The RTD is a component that measures the temperature of the oven and sends a signal to the control board. If the RTD is open or shorted, the control board will not be able to accurately measure the oven temperature.

Symptoms of an Open or Shorted Oven Temperature Sensor

There are a few symptoms that can indicate an open or shorted oven temperature sensor.

These include:

• The oven does not heat properly.
• The oven takes longer to heat up.
• The oven displays an error code.

Possible Causes of an Open or Shorted Oven Temperature Sensor

There are a few possible causes of an open or shorted oven temperature sensor.

These include:

• Sensor damage: The sensor can be damaged by physical impact, heat, or chemicals.
• Wiring damage: The wiring that connects the sensor to the control board can be damaged by physical impact or corrosion.
• Control board failure: The control board can fail and send incorrect signals to the sensor.

Troubleshooting an Open or Shorted Oven Temperature Sensor

If you suspect that the oven temperature sensor in your Monogram range is open or shorted, you can try the following troubleshooting steps:

1. Check the sensor harness and harness connection: The sensor harness is the wiring that connects the sensor to the control board. Inspect the harness for any damage, such as cuts, burns, or loose connections. If you find any damage, repair or replace the harness.
2. Check the sensor: If the harness is in good condition, check the sensor itself for any damage. You can do this by using a multimeter to measure the resistance of the sensor. The resistance should be within the specified range for your range model. If the resistance is outside of the specified range, the sensor will need to be replaced.

Replacing the Oven Temperature Sensor

If the sensor needs to be replaced, you can purchase a new sensor from a Monogram authorized dealer.

To replace the sensor, follow these steps:

1. Unplug the range.
2. Remove the back panel of the range.
3. Locate the oven temperature sensor.
4. Disconnect the wiring from the sensor.
5. Remove the old sensor.
6. Install the new sensor.
7. Reconnect the wiring to the sensor.
8. Reattach the back panel of the range.
9. Plug in the range.

Additional Information

• The F3 error code is typically displayed when the sensor is open, while the F4 error code is typically displayed when the sensor is shorted.
• If you have checked the sensor harness and sensor and the error code is still present, the control board may be the problem. In this case, you will need to contact a qualified appliance repair technician.