Honeywell Mineral Dust Emission (Ultrasonic Models)

Humidifier produces white dust on nearby surfaces.

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Possible Causes

Use of hard tap water, Lack of demineralization cartridge, Saturated or missing mineral filter, Excess output setting

How to Fix / Troubleshooting

Safety: Unplug before servicing.

Steps:

  • Switch water source: Use distilled or demineralized water instead of hard tap water.
  • Install or replace cartridge: If your Honeywell humidifier supports a demineralization cartridge, install a new Honeywell cartridge or replace an old one.
  • Reduce output: Lower the mist output setting to reduce airborne mineral carryover.

Tip: Regularly clean the tank and base to prevent mineral buildup that can contribute to dust.

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Repair Difficulty

Very Easy 1/5

Required Part

Demineralization Cartridge (if applicable)
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