Safety first: Turn off power and allow the oven to cool completely before inspection.

Check ventilation: Ensure that cabinet cut-outs and front vents are not blocked by panels, insulation, or items stored around the oven. Maintain Miele's specified clearances.
Verify cooling fan operation: During a heating cycle, the cooling fan should run. If it does not, inspect and test the cooling fan motor and its wiring as described in the cooling fan fault section.
Inspect overheat thermostat: Locate the overheat thermostat on the top or rear of the cavity. Test for continuity at room temperature. Replace if open or if it trips prematurely.
Control temperature sensor: Some models monitor control board temperature. If the sensor or board is faulty, it may falsely detect overheat and shut down. This typically requires control module replacement.

Persistent overheat errors after basic checks should be evaluated by an authorized technician to prevent damage to cabinetry and electronics.

Oven reports over-temperature or safety cut-out error; appliance may shut down and cooling fan runs for a long time.

Possible Causes