How CrystalDry works
CrystalDry is Thermador’s zeolite-based drying system, exclusive to Star Sapphire and Emerald dishwashers. Zeolite is a natural mineral that absorbs moisture and releases heat in the process. During the drying phase, moist air from the wash tub passes through a zeolite cassette. The mineral absorbs the moisture and generates heat, which is redirected back into the tub to accelerate drying — all without a heated dry element.
During the next wash cycle, hot wash water regenerates the zeolite by driving out the absorbed moisture, resetting the mineral for the next drying cycle. This self-regenerating system is designed to last the life of the dishwasher under normal conditions.
Maintaining CrystalDry performance
Run a monthly cleaning cycle with a dishwasher cleaner to prevent grease from coating the zeolite. Always use rinse aid — it reduces water surface tension, allowing droplets to sheet off dishes and reducing the moisture load on the zeolite. Don’t overload the dishwasher — blocked airflow prevents moist air from reaching the zeolite cassette.
Signs the cassette needs replacement
Dishes still wet after cycle (especially plastics), musty odor from the zeolite compartment, or no noticeable heat during the drying phase. The zeolite cassette typically lasts 5-7 years before grease saturation reduces its effectiveness to the point of replacement. This is a technician-performed repair — the cassette is accessible from beneath the tub.
Need professional Thermador Dishwasher service?
If troubleshooting doesn’t resolve the issue, our factory-certified Thermador technicians can help. We service all Thermador Dishwasher 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 Dishwasher repair service — certified technicians in all 50 states
- Thermador error code database — search all Dishwasher 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 dishwasher 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 dishwasher 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.
