Step 01
Signs
• Oven will not heat or maintain temperature
• Oven temperature display shows F12 error code
• Unable to preheat the oven
• Cooktop may still function normally while oven is inoperable
• Oven may cycle on and off repeatedly
• Range beeps or displays error message on control panel
• Unable to start self-cleaning cycle (if applicable to model)
Step 02
Possible Causes
• Faulty oven temperature sensor (RTD probe) - most common cause
• Loose or corroded sensor connector due to humidity in USA climates
• Damaged sensor wiring or broken wire connections inside oven cavity
• Sensor plug disconnected from terminal board
• Defective oven control board unable to read sensor signal
• 240V electrical supply issue preventing proper sensor communication
• Excessive buildup on sensor from cooking residue or spillage
• Temperature sensor positioned incorrectly in oven
Step 03
Safety Checks You Can Do
• Turn off the circuit breaker controlling the range for 60 seconds, then turn back on to reset the appliance
• Verify the range has adequate 240V power by checking that other connected appliances function properly
• Check your home's main circuit breaker panel to ensure the range breaker is fully engaged and not tripped
• Allow the range to cool completely for at least 30 minutes before attempting to operate again
• Inspect the oven interior for obvious debris, food particles, or spillage that may be blocking the temperature sensor and carefully remove any visible obstructions
• Verify the oven door is closing completely and the door latch is engaging properly
• Check that the range is level and not tilted, which can affect internal component positioning
• Review your model's control panel settings to ensure no demo mode or test mode is accidentally enabled
• Do not attempt to disassemble the range or disconnect the sensor yourself - contact a qualified GE service technician for sensor replacement or control board repair