Air Filter and HVAC Service Indicators & Gauges

To determine if the Filter Minder® is working properly, if the window on a single position service indicator is showing red, or the position indicator on a graduated service indicator is showing in the window, reset the service indicator by pushing at the end of the indicator. If it resets to zero, the service indicator is operating properly.

If there is no position indicator showing in the clear window:

Remove the service indicator.

Pull a vacuum on the service indicator until the position indicator reaches red zone. If the position indicator does not lock in the red zone, replace the service indicator. Push the reset at the end of the service indicator to reset to zero. If it does not reset, replace the service indicator. Again, pull a vacuum on the service indicator until it locks in the red zone.

Re-install the service indicator.

Push the reset at the end of the service indicator. If it resets to zero, the service indicator and fitting assembly is working properly.

If the position indicator fails to reset fully to zero, check the air cleaner fitting, as the safety filter in the fitting may be plugged. If plugged, replace the fitting. Replacement fittings with safety filters are available from Filter Minder®. Some fittings are welded to the air cleaner, and cannot be removed. In this case, it will be necessary to drill a hole through the fitting, and add a new adapter fitting with safety filter. Be sure to collect the metal shavings to prevent them from getting into the air induction system. Note: Some systems use rubber grommet mount service indicators, which do not utilize a fitting.