Oven will not heat, display shows E001 shortly after attempting to start a cooking program

Safety first: Disconnect the oven from mains power at the breaker before removing any panels. Allow the oven to cool completely.

• Check ventilation: Ensure the cabinet cut-out and front ventilation slots are not blocked. Gaggenau ovens require proper airflow around the unit.
• Reset power: Turn the circuit breaker off for 5–10 minutes, then back on. Try a low-temperature program (e.g. 100 °C) and see if E001 reappears.
• Inspect cooling fan operation: Start a heating program with the oven pulled slightly out (if possible) and listen for the internal cooling fan. If the fan does not run, the oven may overheat and trip the safety cut-out.
• Access thermal cut-out: With power OFF, remove the top or rear cover (depending on model) to locate the thermal safety cut-out/temperature limiter mounted on the oven top or rear. Check for a manual reset button (some limiters have a small red button). Press gently to reset if present.
• Test continuity: Use a multimeter to check continuity across the thermal cut-out. If it is open and does not reset, it must be replaced.
• Inspect wiring: Check connectors and wiring harness from the thermal cut-out to the main control module for signs of heat damage or loose connections.

When to call a technician: If the thermal cut-out repeatedly trips, or if the cooling fan is not running, professional diagnosis is recommended to avoid fire risk.