Oven overheats rapidly, temperature far exceeds the set point, often burning food; may shut down with error.

Safety first: Turn off power at the breaker immediately if the oven is overheating or smoking. Allow the oven to cool completely before working on it.

• Check the temperature sensor resistance: Access the sensor connector from the rear of the oven. At room temperature, the NTC should read about 1000–1100 Ω. A significantly lower reading (e.g., <500 Ω) indicates a shorted sensor; replace it.
• Inspect sensor wiring: Follow the harness from the sensor to the control board. Look for pinched, melted, or bare wires touching the metal chassis. Repair any damaged insulation and secure the harness away from hot surfaces.
• Test for stuck relay: With power off, visually inspect the main control board for burnt spots near the heater relays. If the oven continues heating even when the control is off (before you cut power), the relay contacts may be welded closed. Replace the main control board.
• Verify calibration (after repair): Once components are replaced, use an oven thermometer to compare actual temperature to the set temperature. If needed, use the user menu to adjust calibration according to the Bertazzoni manual.