Normal sounds
Humming: Compressor running — normal operation. Dual-compressor models may have two distinct hum patterns as each compressor cycles independently.
Whooshing: Evaporator and condenser fans circulating air. More noticeable when the compressor is running.
Clicking: Compressor start relay engaging — a single click when the compressor turns on or off is normal.
Popping/cracking: Thermal expansion of plastic interior panels as temperature changes. Most noticeable after a defrost cycle.
Water dripping: Defrost water flowing to the drain pan during and after a defrost cycle.
Investigate these sounds
Repeated clicking (every few seconds): Compressor trying to start but failing — start relay or overload protector issue.
Grinding: Evaporator fan blade hitting ice buildup — defrost system may be failing.
Loud buzzing: Water inlet valve filling the ice maker — normal if brief (10-15 seconds), but continuous buzzing means the valve isn’t closing properly.
Vibrating/rattling: Unit not level, items on top vibrating, or condenser fan hitting debris.
When to call a technician
Constant clicking (start relay failure). Grinding that doesn’t stop (fan/ice buildup). Any burning smell. Complete silence from a unit that should be running.
Need professional Thermador Refrigerator service?
If troubleshooting doesn’t resolve the issue, our factory-certified Thermador technicians can help. We service all Thermador Refrigerator 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 Refrigerator repair service — certified technicians in all 50 states
- Thermador error code database — search all Refrigerator 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 refrigerator 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 refrigerator 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.
