Kenmore Range Error Code F3 E4

F3 E4 on a Kenmore range means the control board has detected an open circuit in the bottom oven temperature sensor. The sensor is responsible for sending temperature readings to the control board so the oven can regulate heat properly. When the circuit is open, the board cannot read the temperature and will disable the oven. This code points to the sensor itself, its wiring, or its connector as the likely source of the problem.

You should not use the bottom oven while this error is active. The control board cannot monitor oven temperature without a functioning sensor, which means it cannot regulate heat accurately or safely. Using the oven in this condition risks overheating. Surface burners on a gas or electric range may still function, but the oven itself should remain off until the fault is resolved.

Unplugging the range for a few minutes and restoring power may temporarily clear the code, but it will return as soon as the control board attempts to read the sensor again and detects the open circuit. A reset does not fix the underlying hardware fault. The code will only stop appearing once the sensor, wiring, or connector issue has been physically repaired or replaced.

In many cases, yes. Start by unplugging the range, removing the back panel, and checking that the temperature sensor connector is firmly seated. If the connector is secure, you can use a multimeter to test the sensor's resistance, which should read approximately 1080 to 1100 ohms at room temperature. If the sensor tests open or out of range, replacing it is a straightforward repair that many DIYers can complete with basic tools.

If only the oven temperature sensor needs to be replaced, parts typically cost between $20 and $60 depending on the model, and the repair is relatively simple. If the wiring harness is damaged, parts and labor costs can range from $80 to $200. A control board replacement, if needed, is the most expensive repair, often ranging from $150 to $400 or more including parts and labor.