Why Is There a Blue Light on My Air Purifier? Reasons & Solutions

Keeping an air purifier in your room can benefit you in many ways. Air purifiers usually have quite a few lights on them to indicate different things, and sometimes some will seem to randomly turn on which can be puzzling.

If you have noticed that a random blue light has lit up in your air filter, this can puzzle you and make you think why is there a blue light on my air purifier. To clear this confusion, we are going to be talking about the different things it can mean!

Why Is There a Blue Light on My Air Purifier?

There are a few possible reasons why there is a blue light on your air purifier, which depends largely on the manufacturer of your air purifier as well as the model. There are two main functions of blue light on an air purifier, and they are discussed below:

  1. Air Quality Control Light

Lately, brands have started introducing quality control lights in their air purifiers. This light changes color depending on the quality of the air in the room. So, if you see that the light is blue, it usually means that you are safe, and the quality of the air is good.

We would like to emphasize that blue may not always mean the same thing for the quality control light in all air purifiers, we are just talking about the usual case. It’s still best to take a few minutes and read the instructions manual.

  1. UV Light

Some air purifiers use a technology called UV germicidal radiation (UVGI) in their air purifiers. The UV light is supposed to help in killing off pathogens, bacteria, viruses, and other microbes to purify the air. The UV light is blue, so you might think of it as just a blue light.

UVGI air purifiers usually work by changing the DNA of the microbes, which then kills them or makes them lose their capability to cause harm.

Although UV light can eradicate harmful microorganisms, there has been some skepticism from experts about the effectiveness of this type of air purifier.

There are valid reasons behind this skepticism; this light is ineffective against VOCs, allergens, and mold spores.

More importantly, some experts are concerned about the dangers that this appliance may have. This is because it is known that the type of radiation can create ozone which is not good for humans, and it’s not good for the environment either.

Final Words

If you have a UV germicidal air purifier, then it is quite easy to detect because you will see long blue glowing bulbs inside the machine, and we’re sure it’ll say on the package. On the other hand, the quality control light is much smaller, like a little LED.

For those of you who have found out you have a quality control light, if the light turns blue, then you should be very happy because this means you have clean air around you!

Last Updated on January 5, 2023

Richard Hicks

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