Air Purifiers

Filters & Accessories

AD5000/5500 Filters

AD4000 Filters

AD3000/3500 Filters

AD2500 Filters

AD2000 Filters

AD1000 Filters

Commercial Filters

HVAC Filter

Diffuser Clip

Learn

Blog Press Our Story AQI

Support

Help Center Contact Us Submit a Request

Shop Now! Call Now!

Air Purifiers

Filters & Accessories

AD5000/5500 Filters

AD3000/3500 Filters

Commercial Filters

HVAC Filter

Learn

Blog Press Our Story AQI

Support

Help Center Contact Us Submit a Request

AirDoctor
Videos
Videos

Articles in this section

How to Log In to Your Account and Check Your Shipping Status
AirDoctor 2500 Air Purifier Installation Video
What can I do if my sensor is always one color, blue or red?
Sensor light always blue - match test
How to Change Your Filters AD 5500
How to Change Your Filters AD 1000
How to Change Your Filters AD 3500
How to Change Your Filters AD 2000
How To Clean Your Sensor
What comes with the AirDoctor 2000 ?

See more

Sensor light always blue - match test

December 27, 2023 16:47

Was this article helpful?

0 out of 0 found this helpful

Have more questions? Submit a request

Related articles

What can I do if my sensor is always one color, blue or red?
How to Change Your Filters AD 5500
How To Clean Your Sensor
How to Clean Your Pre-Filter
AirDoctor 2500 Air Purifier Installation Video

Our mission is to bring clean air to as many people as possible and help them live healthier lives.

AirDoctor is a member of the Ideal Living family of brands.

Shop

Air Purifiers Filters & Accessories HVAC Filters

Learn

Blog AD App Press

Support

Help Center Warranty Registration Affirm Disclosures Reviews

Partners

Affiliates Enterprise International

Privacy Policy Terms of Service Do Not Sell or Share My Information SMS Terms & Conditions Accessibility Affirm

© 2026 AirDoctor, Powered by Shopify

Powered by Zendesk