Caloric Range Error Code F4

F4 on a Caloric range indicates that the oven temperature sensor circuit has been detected as shorted. The control board monitors the resistance from the temperature sensor probe inside the oven, and when that resistance falls abnormally low, it triggers the F4 fault. This prevents the oven from operating under unreliable temperature conditions. The fault points to the sensor itself, the wiring harness, or the connector as the most likely sources of the problem.

It is not recommended to continue using the oven while F4 is active. A shorted temperature sensor means the control board cannot accurately monitor oven temperature, which could result in overheating or unpredictable heating behavior. The oven may also refuse to heat at all as a protective measure. Addressing the fault before resuming oven use is the safest course of action.

Power cycling the range by unplugging it or turning off the circuit breaker for a few minutes may temporarily clear the F4 code, but it will return if the underlying fault in the sensor circuit has not been corrected. A reset does not repair a shorted sensor, damaged wiring, or a failed control board. Proper diagnosis and repair of the root cause is necessary to permanently resolve the fault.

A knowledgeable DIYer can often diagnose and resolve F4 by testing the oven temperature sensor with a multimeter and replacing it if the resistance reading is abnormally low or near zero. The sensor is typically accessible from inside the oven cavity and connects via a harness at the back wall. If the sensor tests correctly, inspecting the wiring harness for visible damage is the next step. Control board replacement is more involved and may warrant professional service.

If the oven temperature sensor is the cause, replacement sensors typically cost in the range of $20 to $60 for the part, and professional labor can add $75 to $150 depending on your location and service provider. If the control board is at fault, board replacement costs generally range from $150 to $350 or more for parts alone. Wiring harness repairs are usually less expensive but depend on the extent of the damage.