2011 Buick Lucern Owner's Manual - Page 178

Manual Operation To change the current mode, select one of the following: 9 (Off): Turns the climate control system off. Outside air still enters the vehicle and is directed to the floor. The airflow direction and temperature can be adjusted. If the temperature is adjusted while the system is off, the display will light to show the current settings. F (Vent): Air is directed to the instrument panel outlets. * (Bi-Level): Air is divided between the instrument panel outlets and the floor outlets. In automatic operation, cooler air is directed to the upper outlets and warmer air to the floor outlets. w x (Driver Temperature Controls): Press these buttons next to the fan control to increase or decrease the temperature inside the vehicle. 7 (Floor): Air is directed to the floor outlets, with some air directed to the windshield and side window outlets. If recirculation is selected while in this mode, it stays on for three minutes to reduce windshield fogging. w x (Passenger Temperature Controls): Press these buttons next to the mode control to increase or decrease the temperature for the front passenger. If the passenger climate control system is off, pressing one of these buttons turns it on. Turn clockwise or counterclockwise to increase or decrease the fan speed. Turning this control completely counterclockwise turns on the automatic fan operation. W (Floor/Defog): 9 (Fan Control): This mode clears the windows of fog or moisture. Air is directed to the floor outlets, with some air directed to the windshield and side window outlets. The system turns off recirculation and runs the air-conditioning compressor unless the outside temperature is at or below freezing. The recirculation mode cannot be selected while in the floor/defog mode. If the airflow seems low when the fan speed is at the highest setting, the passenger compartment air filter may need to be replaced. For more information, see Passenger Compartment Air Filter on page 4 ‑ 25 and Scheduled Maintenance on page 7‑3. Air Delivery Mode Control: Turn clockwise or counterclockwise to change the direction of the airflow in the vehicle. 4-22 0 (Defrost): This mode removes fog or frost from the windshield more quickly. Air is directed to the windshield and the side window outlets. The system automatically turns off recirculation and runs the air-conditioning compressor, unless the outside temperature is at or below freezing. Recirculation cannot be selected while in the defrost mode.