FAQ Search Select a Category Cleaning Formulas Cleaning Tips Corporate Deep Cleaners FAQ Hard Floor Cleaners 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 How can I clear clogs in my Lift-Off® Vacuum? My CleanView® has low to no suction. What should I do? My AeroSwift™ Vacuum is blowing dust. What can I do? Where can I buy bags, belts, and filters for the BISSELL ProLite?