GE Range Error Code F3 E4

F3 E4 on a GE range means the control board has detected an open circuit in the bottom oven temperature sensor. This tells the oven that it cannot receive any temperature readings from the lower oven cavity. The oven will typically stop operating until the fault is resolved. The issue is usually a disconnected wiring connector, a broken sensor, or damaged wiring in the sensor circuit.

It is not safe to use the bottom oven while F3 E4 is active. Because the control board cannot monitor temperature, it has no way to regulate the heat level in the lower oven cavity. Continued use could result in uncontrolled overheating. Avoid using the bottom oven until the sensor issue is diagnosed and repaired.

If only a connector needs to be reseated, there may be no parts cost at all. A replacement bottom oven temperature sensor typically costs in the range of $20 to $60 for the part depending on the model. If a technician is needed for diagnosis and repair, labor charges generally add $75 to $150 or more depending on your location. Control board replacement, if required, is significantly more expensive and can range from $150 to $400 or higher for parts alone.

Many homeowners and DIYers can resolve F3 E4 by unplugging the range, removing the back panel, and checking that the sensor connector is firmly plugged in at both ends. If the connector is secure, testing the sensor with a multimeter to check its resistance value is the next step, and replacing the sensor is a straightforward repair. If the wiring harness is burned or the control board is suspected, professional service is recommended.

Unplugging the range or turning off its circuit breaker for a few minutes may temporarily clear the F3 E4 code, but the code will return as soon as the control board re-scans the sensor circuit and detects the open circuit again. A reset does not fix the underlying problem. The sensor, its wiring, and the connectors must be physically inspected and repaired or replaced.