2005 Buick LeSabre Owner's Manual - Page 139

RECIRC (Recirculation): Press this button to limit the amount of outside air coming into the vehicle. It can be used to prevent outside air and odors from entering your vehicle or to help heat or cool the air inside your vehicle more quickly. Press this button to turn the recirculation mode on or off. When the button is pressed, an indicator light will come on. The recirculation mode cannot be used with the FRONT defrost or VENT modes. On hot days, open the windows to let hot air escape; then close them. This helps to reduce the time it takes for your vehicle to cool down. It also helps the system to operate more efficiently. For quick cool down on hot days, press the AUTO button and the system will automatically enter recirculation mode and the temperature will be at the full cold position for maximum cooling. Using these settings together for long periods of time may cause the air inside of your vehicle to become too dry. To prevent this from happening, after the air in your vehicle has cooled, turn the recirculation mode off. The air conditioning system removes moisture from the air, so you may sometimes notice a small amount of water dripping underneath your vehicle while idling or after turning off the engine. This is normal. Sensors The solar sensor on your vehicle monitors the solar radiation and the air inside of your vehicle, then uses the information to maintain the selected temperature by initiating needed adjustments to the temperature, the fan speed and the air delivery system. The system may also supply cooler air to the side of the vehicle facing the sun. The recirculation mode will also be activated, as necessary. Do not cover the solar sensor located in the center of the instrument panel, near the windshield, or the system will not work properly. Defogging and Defrosting Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. 1 FRONT (Defrost): Press the FRONT button to defrost the windshield by directing airflow toward the windshield and outboard outlets for the side windows. To turn off FRONT, press the AUTO or AIR FLOW buttons. If the AIR FLOW up button is pressed while in the FRONT defrost mode, the system will direct the air toward the instrument panel outlets. If the AIR FLOW down button is pressed while in the FRONT defrost mode, the system will direct the air toward the floor, and the FRONT defrost mode will cancel. Do not drive the vehicle until all the windows are clear. 3-29