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 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 certified Thermador technicians carry genuine OEM parts and serve all 50 states with a 30-day labor warranty.
