Oven overheats; temperature far exceeds set point, food burns quickly, or safety cut-out trips.

Safety first: Disconnect power at the breaker. Allow the oven to cool completely before inspection.

• Check temperature sensor (NTC): Locate the sensor probe inside the cavity (usually at the rear wall, upper corner). Remove the mounting screws and gently pull the sensor out. Disconnect the connector and measure resistance; typical Miele NTC sensors are around 1–1.5 kΩ at room temperature (check service data for exact value). If reading is open, shorted, or far out of spec, replace the sensor.
• Inspect sensor wiring: Follow the harness from the sensor to the control board. Look for pinched, melted, or shorted wires, especially where they pass through the cavity wall. Repair or replace damaged wiring.
• Test temperature limiter: If the oven trips and will not reheat until cooled, the limiter may be weak. Test for continuity at room temperature. Replace if intermittent or open.
• Control relay check: If the oven continues heating even when switched off, the heater relay on the control board may be welded closed. This requires replacement of the electronic control module.

After replacing parts, run a test bake and verify temperature with an oven thermometer. For calibration or control board replacement, professional service is recommended.