2010 Buick Lucerne Owner's Manual - Page 179

Operation ( (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. Temperature Control: Turn clockwise or counterclockwise to increase or decrease the temperature. 9 (Fan Control): A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Recirculation E. Air Conditioning F. Rear Window Defogger Turn clockwise or counterclockwise to increase or decrease the fan speed. The fan speed is temporarily reduced between the transition to a new mode. The fan will resume when the new mode is complete. 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 4‑28 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. 4-19