1997 Pontiac Grand Am Owner's Manual - Page 129

Mode Knob The right control knob changes the functions of your system. 2 VENT Use when outside temperatures are mild, and little heating or cooling is needed. Airflow is through the instrument panel outlets. Set the center control knob to the temperature desired. MAX: Use for maximum cooling. This setting recirculates much of the air inside your vehicle. It maximizes your air conditioner's performance and your vehicle's fuel economy. A/C: Use for normal cooling on hot days. This setting cools outside air and directs it through the instrument panel outlets. '!AHEATER: This setting brings heated air through the heater ducts, and some through the windshield defroster vents. If you have the optional engine coolant heater (engine block heater) and use it during cold weather, 0°F (- 18O C) or lower, your heatingsystem will more quickly provide heat because the engine coolant is already warmed. See "Engine Coolant Heater" in the Index. 9 BI-LEVEL: Use on cool, but sunny days. This setting brings in the outside air, but directs it in two ways. Cooler air is directed to the upper portion of your body through the instrument panel outlets, but slightly warmer air is directed through the heater ducts and defroster vents. At times, this temperature difference may be more apparent than others. 9BLEND: This setting divides airflow equally between the heater ducts and the windshield defroster vents. DEFROST This setting directs air through the windshield defroster vents located on top of the instrument panel. 3-4