: Ensure the tank is properly seated on the base. Check if the water level is too low, as many models have an auto shut-off feature.
| Problem | Likely cause | Fix | |---------|--------------|-----| | No mist | Water low | Refill tank | | | Transducer dirty | Clean with vinegar | | | Unit not level | Place on flat surface | | Low mist | Scale buildup | Deep clean + use distilled water | | White dust on furniture | Hard water minerals | Switch to distilled water | | Unusual noise | Low water or dirty transducer | Clean & refill | equate ultrasonic humidifier user manual