GE Oven Error Code F30

F30 means the control board has detected that the upper oven sensor circuit resistance is outside the acceptable threshold. The sensor, also called an RTD probe, sends resistance readings to the board to report oven temperature. When those readings are too high or too low, the board cannot control temperature accurately and locks out the oven with the F30 code.

No, you should not rely on the oven for cooking while F30 is active. Because the control board cannot verify the oven temperature, it cannot regulate heat accurately, which creates both a food safety risk and a potential burn or fire hazard. Resolve the sensor circuit fault before using the oven for baking or broiling.

Set a multimeter to measure ohms and disconnect the sensor wiring connector inside the oven cavity or at the control board connector CN300 or J300. Measure resistance across the two sensor leads. At room temperature, a good GE oven sensor reads approximately 1080 ohms. A reading of zero ohms indicates a short, while an open line (OL or infinite resistance) indicates a broken sensor or wire. Either condition will cause F30 and requires replacing the faulty component.

Start by checking the resistance of the sensor circuit at connector CN300 pins 1 to 3 (W to W/BK) on the ERC, or at J300 pins 1 to 2 on the Machine Control board. A working GE oven sensor reads around 1080 ohms at room temperature. If the reading is open, shorted, or significantly off, disconnect the sensor leads at the oven cavity and test the sensor directly to determine whether the fault is in the sensor or the wiring harness. Replace whichever component tests out of range.

If the upper oven sensor is the cause, replacement sensors typically cost between $20 and $60 for the part, and the repair is manageable as a DIY job since it usually involves two screws and a wire connector inside the oven cavity. If the wiring harness is damaged, parts cost is similar but routing new wires adds time. A failed ERC or Machine Control board is the most expensive scenario, with boards ranging from $100 to $300 or more depending on the model, and professional labor typically adds $100 to $200.