Humidifier is very loud with a high-pitched whine or buzzing from the transducer area.

Safety: Unplug and empty the humidifier before inspection.

Steps:

• Clean transducer: Remove mineral deposits from the transducer surface with vinegar and a soft cloth.
• Check mounting: Ensure the transducer module is firmly secured to the base and any gaskets are correctly seated.
• Dampen vibrations: Tighten nearby screws and consider adding thin foam pads where plastic parts vibrate.
• Replace transducer module: If noise persists and is excessive, replace the ultrasonic transducer module.