Air purifier filter lasting only a month: causes and fixes
A filter that needs replacement every month usually indicates unusually heavy particle loading, a neglected pre-filter, an installation or…
Troubleshooting
Help matching air purifiers to room size, filter type and household air problems.
Filters & Dust
Air Purifier Filter Light Will Not Reset
If your air purifier filter light stays on after cleaning or replacing the filter, the reset command may not have registered. Check the…
Carbon filter saturated after wildfire week
A carbon filter can become saturated after prolonged wildfire smoke exposure, especially when odors return despite normal airflow. Check…
Troubleshooting
Air purifier keeps shutting off
An air purifier that keeps shutting off usually has a clogged filter, blocked airflow, an active timer or sleep setting, a loose power…
Air purifier making a whistling noise
A whistling air purifier usually has an airflow restriction, poorly seated filter, loose panel, or small air leak. Start with the filter…
Air purifier not helping allergies
If an air purifier is not helping allergies, the problem is often a clogged or incorrect filter, insufficient airflow for the room, poor…
Air purifier not reducing dust
If your air purifier is not reducing dust, the usual causes are a clogged or incorrectly installed filter, weak airflow, poor placement, an…
Air purifier too loud for a bedroom
An air purifier is often loud in a bedroom because it is running at a high fan speed, has a loaded filter, or is vibrating against a hard…
PM2.5 reading that never drops
If your air purifier’s PM2.5 reading never drops, check the particle source, filter and airflow before assuming the purifier has failed.…
Air purifier blowing cold air at night
Most air purifiers circulate room-temperature air rather than cool it. At night, even a gentle stream can feel cold on your skin; try…
Air purifier leaking water from a humidifier combo
A humidifier combo usually leaks because its tank is overfilled or misseated, a cap seal is loose, or water is escaping from a clogged or…
Air Purifier Smelling Like Plastic or Ozone: What to Do
If your air purifier smells like ozone, plastic, or burning, turn it off and unplug it first. Then check the filter, packaging, settings,…
Ionizer residue on walls and electronics
Ionizers can charge airborne particles, causing some of them to settle on walls, furniture, and electronics. Turn the ionizer off, clean…
White Dust Around an Air Purifier: Causes and Fixes
White dust around an air purifier is often mineral residue from an ultrasonic humidifier. Check nearby appliances first, then inspect the…
