GE Range Error Code 300

Error code 300 on a GE range means the oven cavity temperature exceeded 950 degrees Fahrenheit while the door was locked during a self-clean cycle. The control board detected a thermal runaway condition, meaning the oven temperature climbed beyond safe operating limits without being controlled. The oven shuts down automatically as a safety measure. The RTD temperature sensor and the control board are the primary components to inspect when this code appears.

Pressing Cancel will reset the system and release the door lock, and the error code should clear. However, resetting the control does not fix the underlying problem that caused the thermal runaway in the first place. If the RTD sensor is faulty, a relay is stuck, or an element is shorted, the code is likely to return the next time self-clean is run. Use the reset only as a first diagnostic step, not as a permanent fix.

Repair costs vary depending on which component has failed. An RTD temperature sensor is generally the least expensive fix, with parts typically ranging from around 20 to 60 dollars plus labor. A replacement electronic control board is more costly, with parts often ranging from 150 to 350 dollars or more depending on the model, plus labor. If a heating element is the cause, parts usually fall in the 30 to 100 dollar range. Total repair costs including professional labor can range from roughly 100 to 500 dollars or more depending on the diagnosis.

You should not run the self-clean cycle again until the cause of the error has been identified and repaired. Normal baking and cooking may be possible once the oven has fully cooled and been reset, but a thermal runaway fault indicates a real control or sensing problem that needs attention. Operating the oven in self-clean mode before the issue is resolved risks additional overheating. Allow the oven to cool completely, press Cancel to reset it, and consult a technician before running another self-clean cycle.

Start by pressing Cancel to reset the system and allowing the oven to cool fully. Once cooled, test the RTD temperature sensor for proper resistance and inspect its wiring harness for damage or loose connections. If the sensor tests within spec, the control board should be evaluated for a stuck relay. A shorted heating element is another possible cause and can be tested for continuity. Depending on which component is faulty, repairs involve replacing the RTD sensor, the control board, or the heating element.