1993 Buick LeSabre Owner's Manual - Page 128

Bi-Level This setting is designed for use on sunny days when the air is only moderately warm or cool. On days like these, the sun may adequately warm your upper body, but your lower body may not be warm enough. The Bi-level setting directs outside air into your vehicle in two ways. Cool air is directed toward your upper body through the instrument panel outlets, while slightly warmed air isdirected through the heater outlet at your feet. The air conditioner compressor operates all Air in Conditioning positions and the Defrost position when the outside temperature is above 48 OF (9OC). When you don't need to cool the outside air, use the VENT, HEAT, or DEFROST settings. Adjust the temperature control for comfort. You'll get better fuel economy (gasmileage) if you're not cooling the outside air. When you cool the air, your engine runs a refrigeration compressor, and it has to work harder. to turn on, adjust and turn off the air flow. Adjust the temperature lever to the desired temperature. Heater When outside temperatures are cold, pressing the HTR setting and adjusting the temperature lever will send warm air through the floor outlets, and some through the defroster vents. Def The Defrost setting directs most of the air flow toward the windshield. Use defrost when you want to remove fog or ice from the windshield. When it's 48 OF (9 "C) or warmer, you'll get cooled air. Defog Air entering the car will be evenly split between the floor outlets and the outlets near the windshield. You can control the temperature of the air and the fan speed to clear the foggy windows. Vent For mild outside temperature, when little heating or cooling is needed, use the VENT setting. Air will flow through the instrument panel outlets. Use the air outlets 126