Humidifier makes loud buzzing or rattling noise during operation

Safety: Unplug the unit before opening. Keep fingers away from fan blades.

• Check for debris: Remove the top or rear cover to access the fan. Remove any foreign objects (e.g., pieces of filter, packaging) touching the blades.
• Clean fan: Use a soft brush and vacuum to remove dust from the blades and housing. Built-up dust can cause imbalance and noise.
• Tighten fasteners: Verify that the fan motor mounting screws and fan blade hub are tight.
• Spin test: Rotate the fan by hand. If it feels rough or wobbly, the motor bearings may be worn and the motor should be replaced.