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 Why isn't there any suction with my Pet Grooming Tool? My screw broke while assembling my PowerForce® Bagless Vacuum. What can I do? My Garage Pro® blower mode is not functioning. What should I do? The handle on my Momentum or PowerTrak Cyclonic Vacuum is difficult to install. What can I do?