1993 Chevrolet Lumina Owner's Manual - Page 101

Air Conditioning (OPTION) There are threeair conditioning settings: MAX: Provides maximum cooling or quick cool-downon very hot days. This setting recirculates much of the air inside your vehicle, it should not be and used for long periods because air the may become too cold and dry. A / C Use for normal cooling on hot . days. Thissetting brings in outside air, cools it and directs it through the instrument panel outlets. BI-LEV Use on cool, but sunny days. This setting brings in the outside air, but directs it in two ways,The cool a r i is directed to the upper portion of your body through the instrument panel outlets, but most warmed air is directed through the heater ducts anda little to the defrost and side windowvents. At times this temperature difference may be more apparent than others. OFF: Press to turn the system off. Some air will still come from outlets the at thefloor. Press any function button to turn the system on. On very hot days, openthe windows long enoughto let hot inside air escape. This reducesthe time your air conditioner's compressor will have to run, which should help fuel economy. The air conditioner compressor operates in all three air conditioning settings. It also operates in BLEND and ljjjl (Defrost) when the temperqture is above freezing. This helps remove moisture fromthe air inside your vehicle.