1997 Chevrolet Lumina Owner's Manual - Page 140

Air Conditioning Heating On very hot days, open the windows long enough to let On cold days use FLOOR with the temperature control hot, inside air escape. reduces the A/C compressor This all theway in the red area.The system will bring in load, which should help fuel economy. outside air, heat and send it to the floor ducts. it For quick cool-down on very days, useMAX with hot the temperature control all way in the blue area.If the this setting is used long periodsof time, the air in for your vehiclemay become toodry. For normal cooling on hot days, use with the A/C temperature control in the blue area. system will The bring in outside air and it. cool On cool but sunny days, the may warm your upper sun body, but your lower body may not wann enough. You be can use BI-LEVEL with the temperature control in the middle. The system will bring in outside and direct it to ar i your upper body, while sending slightly warmedi to ar your lower body. You may noticethis temperature difference more at some times than at others. If your vehicle has an engine coolant heater, you use can it to help your system provide warm air faster when it's cold outside(0°F (-18°C) or lower).An engine coolant heater warms the coolant your engine and heating system use to provide heat. "Engine Coolant See Heater" in the Index. Ventilation System Adjust the directionof aifflow by moving the louvered vents. 3-4