1993 Buick Park Avenue Owner's Manual - Page 140

The Bi-level setting directs outside air into vehicle your in two ways. Cool air is directed toward your upper body through instrument panel outlets, while slightly warmed air isdirected through the heater outlet at your feet. The air conditioner compress& operates in all Air Conditioning positions and the Defrost position when the outside temperature is above 48 O F (9"C). When you don't need to coolthe outside air, use the VENT, HEAT and 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. Heater When outside temperatures are cold, pressing the HTR setting and adjusting thetemperature lever will send warm air through the floor outletsand some through the defroster vents. Defrost The DEFROST setting directsmost of the air flow toward the windshield. Use defrost when you want to remove fog or ice from the windshield. When it's 48OF (9 * C) orwarmer, you'll get cooled air. Defog Air entering the vehicle will be evenly split between the floor outlets and the outletsnear 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 thought the instrument panel outlets. Use the air outlets to turn on, adjustand turn off the air flow. Adjust the temperature lever to the desiredtemperature. 138