Posts Tagged: Active Grille Shutter Problems

Active Grille Shutter Problems — How To Diagnose and Fix

How to Fix Active Grille Shutter Problems The active grille shutter has three jobs: 1) reduce aerodynamic vehicle drag, 2) increase MPG during periods when engine cabin cooling loads are low and high airflow through the condenser and radiator are not required, and 3) help keep coolant at a high enough temperature to provide adequate heat for the cabin. During all those periods, the shutters are closed. But these units aren’t perfect. Because they’re mechanical louvers run by a motor, they can develop active grille shutter problems that set a … Read More