Informational Guide

Blueair Purifier Troubleshooting (9 Common Issues)

by Josh M

Protecting yourself from airborne pollutants is more vital than ever, especially with the knowledge that the US pumps around 67 million tons of pollution into the atmosphere each year. [1]

Blueair air purifier models are a handy tool that can moderate your home’s air quality. However, like all machines, it sometimes needs some maintenance; we have gathered some of the best troubleshooting techniques to aid your Blueair air purifier.

It can be incredibly frustrating to troubleshoot your machine, especially after you just purchased it. However, the warranty conditions your particular model falls under could help you get replacement parts or the entire model for free.

Registering your Blueair blue air purifier for warranty is technically optional, but we highly recommend doing so after purchase as getting help is easier should something break down.

A Blueair air purifier limited warranty covers materials and workmanship for one from the date of purchase. The first 30 days from purchase also allow Blueair to replace or repair defective machines at no cost to you. After the 30 days, Blueair can still do this at their discretion.

It is possible to extend the guarantee from one year to five, depending on your circumstances, by applying online or in the mobile app.

Common Issues with BlueAir Air Purifier

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Not Turning On At All

If you find your Blueair air purifier is not turning on, you first need to confirm that it is plugged in and turned on. Next, inspect the power cord and cable for any damage and contact customer service to replace it if necessary.

If this still does not work, make sure that the connected electrical outlet is switched on and functioning by plugging in a different appliance. Alternatively, the fuse or the Blueair filter may need to be replaced.

Once you have tested all of these, you should be able to plug in and switch on your air purifier; if not, contact customer services for a technician or replacement model.

Red Filter Light Won’t Go Off After Filter Replacement

A red light on the Blueair purifier filter indicator typically means that it is time to replace or clean your Blueair filter [2]. When it shows up, we recommend removing the filter and cleaning or replacing it according to user manual instructions. [3]

If the problem persists, you may need to either reinstall the filter to make sure it is secure, confirming that there are no blockages or dirt in the filter section of the purifier. Experiencing the same issue after all of this could mean that your Blueair air purifier filter is damaged or the filter is malfunctioning; contact customer service for replacements.

Making Odd Noises

As your filter works its magic, you will get used to a certain level of background noise. However, new sounds can mean that you need to perform some Blueair purifier troubleshooting.

Air purifier noises may mean that your filter is clogged or too dirty, in which case cleaning or replacing it should help. Alternatively, the exhausts and intake grills may be blocked, disrupting the airflow.

Location is also vital for air purifiers; try to adjust the location and see if that helps free up the airflow. For example, try putting it on the floor or near the source of an odor to see if that helps with the noise.

If all of this does not work, try turning your air purifier off, unplugging it for a bit, and restarting it again. Should you still experience issues, contact the customer service team for help.

Won’t Turn On After Filter Replacement

Replacing or cleaning your Blueair air filter and pre-filter regularly as part of your maintenance keeps your models running smoothly. This can fix most issues with Blueair models this way.

Should you experience issues once the filter is in, we recommend inspecting your power cord, fuses, and fusebox. Once everything is in order, reinstall the filter according to user manual instruction. Finally, check that your remote control’s battery is charged or if it needs replacing if you have one.

Suddenly Stops Working

One of the main reasons a Blueair unit may suddenly stop working is due to a power outage or blown fuse. A fan not working can come down to a lack of electricity or a blockage that needs to be removed.

Inspect the fuse carefully and replace it if necessary; you will need to search for a certified electrician if you have general electrical outlet issues. Alternatively, your cord may have become damaged and needs replacing.

For those who tend to leave their unit running all day and night, you may need to turn it off and unplug your air purifier to let it cool down. Declogging and cleaning your filter while you wait should help prevent overheating in the future.

Smells Bad When Running

New air purifier units, like many new home items, tend to carry a certain odor that should dissipate over time. For older units, the likely culprit of odd smells is typically a dirty filter or clogged exhausts. Cleaning your device thoroughly and replacing the filter should remove unwanted smells.

Related ArticleWhat To Do If Air Purifier Smells

Doesn’t Work On Higher Speed

All electrical items need a certain power level to function correctly; should you have issues with higher fan speeds, you may need to switch to a higher-powered power outlet. Alternatively, the unit or remote buttons may be stuck or broken and need to be replaced.

If all of the above is in order, we recommend inspecting your fan area for any blockages and removing dust. If all else fails, contact the customer services team for advice on how to move forward.

Not Displaying Lights

A Blueair air purifier uses lights to indicate when certain programs are running or when you need to perform maintenance. If these lights are not showing up, this is typically a power issue; similarly to above, we recommend confirming that your power works, that the device is undamaged and plugged in, and that the fuse is in working order. If all of this fails, check in with the Blueair helpdesk.

Sensor Is Not Working Properly

Air purifiers typically have a built-in sensor that monitors your air quality and decides how to filter out pollutants. Like all electrical features, your sensor may need a little help getting back to work. When a sensor does not work, the culprit is typically what it is trying to remove – dust.

Try opening up your unit to expose the sensor and gently clean it with a cotton swab. Once done, replace everything, plug your device in and turn it on.

Another issue may be that something may be blocking the sensor from working properly; location is key, and it is not recommended to put a cloth or other objects on top of the air purifier. Instead, try to adjust the location – if this does not work, we recommend organizing for a technician to inspect it.

Why Choose BlueAir

Blueair Purifier Light Indicators: What Do They Mean?

Blueair air purifiers have a variety of handy control functions that light up when selected or indicate something vital. Knowing what each color can mean will help you understand how to care for your unit correctly – we have some general pointers here that can be clarified in your user manual or Blueair app settings.

Blue Light

Depending on the model, a blue light typically displays on the air quality indicator when the air quality is excellent or higher. [4]

Red Light

Red lights can mean a few different things depending on the Blueair model. If the light is red on the filter replacement indicator, it means that you need to change to a new filter or clean it according to the internal filter replacement timer.

Alternatively, it may mean that the air quality is low if it is located on the data indicator. Finally, a red light on Blueair purifier may mean that the wi-fi, Germshield, or Auto mode is struggling and needs troubleshooting.

Orange Light

An orange light on the air quality indicator could be a sign that your air is a little polluted, depending on the device.

Yellow Light

Yellow light can typically be seen on the air quality indicator to show that the levels are currently moderate. Alternatively, an orange filter warning indicator light means that it is almost time to change your filters – this typically shows at around the five-month mark depending on the air quality in your area.

Green Light

A green light can refer to the power being on or the air quality being good in your home.

BlueAir LED Indicator

How To Quickly Reset Blueair Purifiers

When all else fails, a simple reset of your Blueair Blue Pure unit can help fix some internal issues. To reset your Blueair air purifier, you will typically need to:

  • Ensure that the unit is plugged into a functioning system and turned on
  • Press and hold the reset button for 10-20 seconds. Which button and for how long specifically will be noted in your user manual or the Blueair app.

How To Easily Clean Blueair Purifiers

  1. Turn off and unplug your Blueair unit.
  2. Remove the pre-filter according to manual instructions.
  3. Depending on the model and pre-filter type, you will need to either vacuum with a vacuum cleaner and soft brush attachment or wash it in the sink according to the manual instruction.
  4. If you can wash your pre-filter, make sure it dries completely before moving on.
  5. Reassemble your unit by reversing step two’s method.
  1. Turn off and unplug your Blueair unit.
  2. Remove the pre-filter according to manual instruction.
  3. Depending on the model and pre-filter type, you will need to either vacuum with a vacuum cleaner and soft brush attachment or wash it in the sink according to manual instructions.
  4. If you can wash your pre-filter, make sure it dries completely before moving on.
  5. Replace the filter and reassemble your Blueair model.

Related ArticleHow To Clean Air Purifier Filter

  1. Turn off and unplug your Blueair model.
  2. Remove the lid and expose the sensor as detailed in the manual.
  3. Carefully clean the sensor with a cotton swab.
  4. Reassemble everything according to the manual.
  5. Plug in and turn on your unit.

Why Clean BlueAir Filter

Frequently Asked Blueair Purifier Questions

How often do I need to change my Blueair filter?

That depends on various factors, including the air quality in your area, how often your run your air purifier unit, and more. Blueair’s website suggests changing your filter every six months or so with regular use, but we would suggest keeping an eye on the filter change indicator for a more accurate suggestion.

Can you recycle Blueair filters?

In a more eco-conscious world affected by climate change, being able to recycle your home goods is an essential part of life.

For Blueair filters specifically, the polypropylene parts of the filter may be recyclable – we suggest contacting your regional recycling center for state-specific rules and advice.


Blueair air purifiers can be a helpful tool in managing your health and home air quality. Thanks to our handy Blueair purifier troubleshooting tips above, we hope maintaining your unit is a breeze.

For specific unit instruction or advice not found here, we recommend that you visit Blueair’s website or contact the customer service team.



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Last Updated on January 9, 2023

Josh M

My name is Josh and I am obsessed with the HVAC industry. I created this website to help HVAC techs of all levels get the best out of their heating & cooling systems. I have spent thousands of hours studying air conditioners, heaters and home air products so you can learn & buy with confidence. Learn more about the team here.