FAQ Search Select a Category BarkBath Cleaning Formulas Cleaning Tips Commercial Products Corporate Deep Cleaners Hard Floor Cleaners Mops, Brooms and Brushes Parts and Accessories Steam Sweepers Vacuums Warranty Web Site and/or go What is the purpose of the Clean Filter Indicator? Answer: The Clean Filter Indicator, located on the upper-tank of your vacuum, lets you know when airflow in the vacuum is reduced due to dirty filters or a clog. If airflow is reduced, the light will change from green to red. Related Questions Why is my vacuum sounding loud? What should I check? Why doesn't my vacuum suction anymore? What should I do if my machine has no power? How do I Install or remove the handle on my PowerGlide® with Lift-Off® Technology?