why does my air purifier keep turning off?

You’ve turned on your air purifier and it’s running. You leave the room, and when you come back, the machine is off again. This can be very frustrating, especially if you’re trying to use your air purifier during a time of day when you need it most—for example, while sleeping. But don’t worry; there are several possible reasons why your purifier has turned off and how to fix them!

Check your air purifier’s control panel.

  • Check the control panel. If you have an error message, it could be because the filter is dirty or needs to be replaced.
  • Check your power light. If it’s off, check that the outlet is working by plugging something else into it (if it works for other things but not your air purifier, then take our advice and get a new one).
  • If both of these steps don’t turn out anything useful, try unplugging and replugging all cords before giving up on this particular troubleshooting step!

Make sure your air purifier is plugged in all the way.

You should always make sure your air purifier is plugged in all the way. If it’s not, the cord may be loose and will cause the air purifier to shut off.

To check this:

  • Check that your outlet has power by plugging in something else that has a cord—for example, a lamp or another appliance you know works—and then flipping on the switch for that item. If it does not light up, then there is no electricity coming through your outlet and you need to contact an electrician because there could be an issue with how your outlets are wired together in your home or apartment building.
  • Make sure that if you are using an extension cord, it is plugged into an outlet which has power; otherwise, this can also cause problems with your air purifier turning off unexpectedly

Check the filter.

If your air purifier keeps turning off, the first thing to check is the filter. The filters on these devices are made from different materials and can be cleaned or replaced. If you have a HEPA filter, it should be replaced every 6 months.

If you find that your filter is clogged with dust and debris, this could be why your purifier keeps turning off. Remove any clogs by shaking out the filter in a dustpan or vacuuming it clean with an upholstery attachment. You can also use compressed air to blow away any dust buildup inside the device itself if needed (be careful not to blast too much).

Replacing the filter in air conditioner and outdoor air purifier. Purifier filters and portable air conditioner

Clean or replace your purifier’s filter as needed.

If you’re using a HEPA filter, your purifier will automatically turn off when it’s time to replace the filter. You can also check the air purifier’s manual for information on how often to clean or replace its filter.

Some types of filters have different maintenance needs than others. For example, an electrostatic (ES) type of HEPA filter requires only cleaning under certain circumstances, whereas a charcoal filter will need to be replaced every few months or so depending on how much dust and dirt you have in your home.

If your air purifier uses a pre-filter as well as an HEPA or other type of main filter, both should be changed at least once per year—more often if they become very dirty (see above).


The key to a well-running air purifier is having the right filters and using them properly. If your filter is dirty or clogged, it won’t be able to capture all of the harmful particles in the room’s air.

If you’re cleaning your filter regularly but still having issues with it, try replacing it with a new one if it’s part of an ongoing series (for example, replace only the charcoal filter every three months). If that doesn’t help solve your problem, call in a technician to help figure out what might be happening.


If your air purifier keeps turning off, look at these possible causes and solutions. If one of these solutions doesn’t work, try another until you find the right fix for your problem!

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