The Dashboard Button Most Drivers Ignore—And Why It Actually Matters

under certain conditions.

How Your Vehicle’s HVAC System Works
Your vehicle’s heating, ventilation, and air-conditioning system ( HVAC) generally operates using two basic airflow modes.

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1. Fresh Air Mode (Recirculation OFF)
   Outside air is drawn into the vehicle.
   Air passes through the cabin air filter.
   The system heats or cools the air as needed.
   Conditioned air is distributed throughout the cabin.
   Fresh-air mode continuously brings outdoor air into the cabin, helping replace the air already inside the

2. vehicle.

   2. Recirculation Mode (Recirculation ON)
      your heating and air-conditioning system work more efficiently under certain conditions.

   How Your Vehicle’s HVAC System Works
   Your