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 Lift-Off Bagless clean filter indicator? Answer: The Clean Filter Indicator is located on the upper-tank above the BISSELL logo. This indicator tells you when airflow in the vacuum is reduced due to dirty filters or a clog, by turning from green to red. Related Questions Why is my vacuum sounding loud? What should I check? Where can I get a replacement brush and brush belt for my BISSELL Go Vac? Why doesn't the power cord rewind fully on my Pet Hair Eraser® or Opticlean® Cyclonic Vacuum? My Momentum® or PowerTrak Cyclonic Vacuum® trips my circuit breaker. What should I do?