GE Range Error Code F30

The F30 error code on a GE range indicates an open condition in the RTD (Resistance Temperature Detector) sensor probe circuit. The RTD sensor is a temperature-sensing resistor installed inside the oven cavity that continuously reports oven temperature to the Electronic Oven Control (EOC) board by varying its electrical resistance as temperature changes. When the EOC detects that the circuit is open, meaning electrical continuity has been broken, it can no longer receive valid temperature data and triggers the F30 fault. Notably, the EOC may initially display an F10 code because the absence of a valid signal can be misread as a runaway temperature condition before the board correctly identifies the open circuit and settles on F30.

The root cause is either a failure in the RTD sensor probe itself or a wiring problem somewhere along the probe circuit. The RTD sensor has a predictable resistance value at any given temperature, and resistance charts specific to the probe model allow technicians to verify whether the sensor is functioning correctly. At room temperature, the resistance reading should fall within the range specified on that chart. A reading that is infinite or far outside the expected range confirms an open condition in either the probe or the wiring connecting it to the EOC board.

Diagnosis begins with a visual inspection of the probe wiring harness for damage, corrosion, or loose connections, followed by an ohmmeter check of the RTD resistance at room temperature. If the wiring checks out and the resistance does not match the probe chart, the sensor probe requires replacement. If a new probe does not resolve the fault after allowing the oven to cool and restarting the cooking function, the EOC-Display Board itself is the likely culprit and will need to be replaced.