Operating Modes. Pontiac Sun Runner - 4WD (Canada) 1998

For 1990-2009 cars

Ventilation mode discharges air from the upper air outlet.

Bi-level mode divides the airflow between the upper air outlets and the floor air outlets. Warmer air is delivered to the floor outlets than is delivered to the upper air outlets.

Heat mode directs air toward the floor outlet. A small amount of air is delivered to the windshield.

Heat/defroster mode routes a portion of the heated air to the windshield. The floor and side window outlets receive the remaining air.

Defrost mode directs most of the air to the windshield. A small amount of air is delivered to the side windows and to the floor.