2009 Buick LaCrosse Owner's Manual - Page 144

Temperature Control: Turn clockwise or counterclockwise to increase or decrease the temperature inside the vehicle. Air Delivery Mode Control: Turn clockwise or counterclockwise to change the direction of the airflow inside the vehicle. Select from the following air delivery modes: A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Recirculation E. Air Conditioning F. Rear Window Defogger H (Vent): Air is directed to the instrument panel outlets. If driving in city traffic, and the vehicle is stopped and idling, or the weather is hot, turning on the recirculation mode helps to prevent the air inside the vehicle from becoming stale. After five minutes recirculate will allow some outside air into the vehicle. ) (Bi-Level): Air is divided between the instrument panel and floor outlets. Some air may be directed toward the windshield. Slightly cooler air is directed to the instrument panel outlets and warmer air is directed to the floor outlets. 6 (Floor): Air is directed to the floor outlets, with some air directed toward the side window outlets and windshield. In this mode, the system automatically uses outside air. The air conditioning compressor will be engaged unless the outside temperature is 40°F (4°C) or below. OFF: Turn the fan control knob to this position to turn the climate control system off. 9 (Fan): Turn the knob by this symbol, located on the left side of the climate control panel, clockwise or counterclockwise to increase or decrease the fan speed. The fan speed is temporarily reduced when adjusting modes, but resumes the original speed when the transition to the new mode is complete. 3-22