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Blue Air Purifier Red Light: Check Out 5 Important Things

Is your Blue air purifier red light blinking? It is not a good sign and it is most probably due to a problem with the cleaner. But you can fix it by reading our troubleshooting guide. Let’s check!

Quick Answer

If you are experiencing a blinking light on your air purifier, there is no need to panic, as there are several easy solutions to fix the issue. The red light on an air purifier can indicate a problem with the device’s filter, sensors, or air quality detection.

However, it’s important to address this promptly. Continue reading to learn how you can resolve common issues with your air purifier.

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What is The Meaning of Red Light?

The condition of the filter on the blue air purifiers makes the indicator either red or yellow.

  • Yellow: If the light is yellow then it means that you should get ready to replace the filter.
  • Red: If it turns red, the filter should be changed immediately.
Blue Air Purifier Red Light
Note: The light acts as a filter replacement indicator.

Life Span

If you are using a new filter, then you should know next:

  1. It will take about 5 months of continuous use before the filter light turns yellow.
  2. When you continue to use it for an additional month, it will turn red.
  3. Basically, the average replacement time comes around to about 6 months. This is when you regularly use the Blueair air purifier. If your usage is very low, then you don’t need to change the filter.
  4. When there is a red light on the filter and you keep using the air purifier, it will not filter out the harmful particles.
  5. The filter loses its efficiency over time and therefore, replacement becomes necessary.
  6. There is sometimes an orange light as well that is used for indicating that the filter requires maintenance.

Poor Air Quality

Blue air purifiers such as the 480i and 280i have an air quality indicator. If there are a lot of airborne particles, then it starts to blink red. You have two choices:

  • Either put the purifier in auto mode
  • Use the maximum performance mode to quickly filter the air.

As soon as the air quality is good again, the indicator will start showing a blue light.

Note: There are a lot of other Blueair air purifiers that don’t have this indicator. Generally, a red light on some air purifiers indicates poor air quality.
Blue Air Purifier Red Light:. Poor Air Quality

How Do You Fix Red Light Problem?

When it comes to fixing the red light problem, you can easily do it without any trouble. Here are some of the troubleshooting things that you should know about:



1. Clogged Filter

Clean the filter

2. Overheated Circuit

Cool down the device

3. Broken Filter

Replace the filter

4. Software Glitch

Reset the air purifier

Step 1: Pre-Filter Cleaning

The first step is to simply clean the fabric pre-filter. A clogged air filter is one of the most common causes of malfunctioning a blue air purifier. Therefore, before trying anything else, try to clean the pre-filter. Here’s how you can do this:

  1. Turn off the device’s power
  2. Gently remove the pre-filter. (Refer to the manual if you encounter any issues while doing it)
  3. Shake it to lose the dust
  4. After getting rid of dirt, wash it with lukewarm water. You can also use mild detergents.
  5. When you are done washing, hang the filter so it can dry but do not use a dryer.
  6. Once it is completely dry, reinstall it by following the manual.

Step 2: Power Cycling the Air Purifiers

Is the air purifier’s red light not going away even after cleaning the air filter? It might be a software glitch in your device and a reset is what you need to do. Resetting a blue air purifier is really easy.

You just need to hold the main power button for about 10 seconds and the air purifier’s red light will turn to a white light. You can continue using the device again.

Step 3: Cooling Down the Device

If you are continuously using the blue air purifier then it can get overheated. This is a very serious problem as overheating can cause irreparable damage. If you have already reset the device and it is still showing a red light, then you should let the blue air purifier cool down.

Note: The best practice is to let it rest for about an hour. After leaving it for a bit, turn it on and it should be working.

Step 4: Filter Replacement

Do you remember the last time you changed a HEPA filter or the carbon filters? A lot of people tend to forget that replacement filters are necessary when you have been using the same filter for more than 6 months.

A filter change is really easy and should only take a few minutes to replace the old filter.

  • You can replace it by pressing the lock tabs of your purifier
  • Removing the old one from the filter holder and install the new filter
  • Make sure it fits perfectly and lock tabs snap into their place.
Note: You need to change the main filter two times a year for the best performance.

You can also check out this video for reference.

Step 5: Moving the Purifier

There are cases in such a red light is an indication of a high number of air pollutants. The air purifier is struggling to filter out the air and therefore, the best course of action is to move the purifier to a different location.

Unplug the power cord from the wall outlet and move it to another room. Make sure to turn it off to avoid damage to any of the internal components. The purifier will start to function normally again.

How Do You Fix Red Light Problem


How do you reset the red light on an air purifier?

You can reset the red light by pressing the main power button for 10 seconds. If this does not work, try reaching out to Blueair customer support on how to reset the purifier.

What does red on the air purifier mean?

A red light on an air purifier is an indication of the following things; a filter change, sensor issue, or poor air quality.


Blue Air Purifier red light can indicate various issues, including problems with the device’s filters, sensors, or air quality detection. By using our troubleshooting guide, you can identify and resolve many common errors and keep your Blue Air Purifier working at peak efficiency.

Have you ever experienced a blinking red light on your air purifier? What did you do to resolve the issue? Let us know in the comments below!