Oven overheats well beyond the set temperature; food burns quickly and may trigger smoke.

Safety first: Turn off the oven and cut power at the breaker immediately if overheating occurs. Allow the appliance to cool completely before inspection.

• 1. Confirm symptom: Use an oven thermometer to verify that the actual temperature is significantly higher than the set point (e.g., set to 180°C but thermometer reads 250°C+).
• 2. Test the temperature sensor: With power disconnected, access the sensor connector behind the oven. Measure resistance at room temperature; a shorted sensor will show very low resistance (near 0 Ω). Replace the sensor if readings are out of specification.
• 3. Inspect harness: Check the sensor wiring from the probe to the control board for pinched or melted insulation that could cause a short.
• 4. Check control board relays: If the sensor is correct but the elements remain energized continuously during operation, the heating relay on the electronic control board may be welded closed. The control board will need replacement.
• 5. Mechanical thermostat models: On La Cornue ranges with mechanical thermostats, verify that the thermostat capillary bulb is correctly positioned in its holder and not damaged. If the oven still overheats, the thermostat may be out of calibration or failed and should be replaced.