1996 Oldsmobile Achieva Owner's Manual - Page 124

VENT Use when outside temperatures are mild, and The center control knob regulates the temperature of the air coming through the system. little heating or cooling is needed. Airflow comes through the instrument panel outlets. Set the center control knob to the temperature desired. &ob The right control knob changes the functions of your system. HEAT 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 useit during cold weather, 0°F (-18°C) or lower, your heating system willmore quickly provide heat because engine coolant is the already warmed. See "Engine Coolant Heater" in the Index. MAX: Use for maximum cooling. This setting recirculates much of the air inside your vehicle so it maximizes your air conditioner's performance and your vehicle's fuel economy. NORM: Use for normal cooling on hot days. This setting cools outside air and directs it through the instrument panel outlets. DEFOG: This setting divides airflow equally between the heater ducts and the windshield defroster vents. BI-LEV: Use on cool, but sunny days. This setting brings in theoutside air, but directsit in two ways.The cool 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. The air conditioner compressor is enabled in all threeair conditioning positions. DEF: This setting directs air throughthe windshield defroster ventslocated on top of the instrument panel. 3-2