Star Burner won’t ignite
Clean the burner ports with a pin or needle — the five-point star design has more ports that can clog with food debris. Dry the igniter area if the burner was recently cleaned with water. Try lighting another burner — if all burners fail, the gas supply or ignition module may be the issue. If the igniter glows but the burner doesn’t light, the igniter is weak (it needs to reach a specific temperature to open the gas valve).
ExtraLow not holding
ExtraLow simmer requires precise gas valve calibration. If the flame goes out at the lowest setting, the valve may need professional recalibration. Ensure the burner cap is properly seated — a misaligned cap disrupts the gas-air mixture.
Oven temperature inaccurate
Test with an oven thermometer placed in the center rack. Thermador ovens can be calibrated via the control panel — consult the manual for the calibration procedure. If the offset exceeds ±35°F, the temperature sensor may need replacement.
Convection fan noise
Some airflow noise is normal in convection mode. Grinding or rattling indicates a worn fan bearing or loose blade. Grease buildup on the fan blade causes imbalance — the fan cover inside the oven can be removed for cleaning.
Need professional Thermador Range service?
If troubleshooting doesn’t resolve the issue, our factory-certified Thermador technicians can help. We service all Thermador Range models across all 50 states with genuine OEM parts and a 30-day labor warranty. Schedule service online — same-day booking available.
Related Thermador resources
- Thermador Range repair service — certified technicians in all 50 states
- Thermador error code database — search all Range error codes
- Thermador model database — specifications and repair info by model number
- Thermador official site — official specifications, manuals, and product information
Important notes for Thermador range owners
- Always use genuine OEM parts — aftermarket components may fit but can compromise performance, safety, and warranty coverage on Thermador appliances
- Never ignore error codes — Thermador codes are diagnostic aids designed to prevent small issues from becoming major failures. Address them promptly
- Keep your owners manual accessible — it contains model-specific maintenance schedules and troubleshooting trees. Digital versions are available on the Thermador official site
- Document issues before calling — note error codes, symptoms, when they started, and patterns. This helps the technician diagnose faster
- Use surge protectors — power fluctuations damage electronic control boards. A quality surge protector protects your investment
When DIY troubleshooting is not enough
Some Thermador range issues can be resolved with the steps in this guide. However, call a certified technician immediately if you encounter:
- Gas smell (gas models) — turn off the appliance, open windows, leave the house, call from outside
- Burning smell or smoke — disconnect power immediately. Do not use until inspected
- Electrical sparking — turn off at the circuit breaker. Wiring or component failure
- Water leaking inside walls — shut off supply and call to prevent water damage
- Error codes that return after power reset — persistent codes indicate real component failure
- Sealed system issues — compressor, refrigerant work requires EPA-certified technicians
Schedule service online — our factory-certified Thermador technicians carry genuine OEM parts and serve all 50 states with a 30-day labor warranty.
