2005 Buick Century Owner's Manual - Page 123

MID (Instrument Panel): This mode directs air through the instrument panel outlets. FLOOR: This setting sends most of the air through the outlets near the floor. The rest comes out of the defroster and side window outlets. VENT: Press this button to turn the air-conditioning compressor on or off. The indicator light on the VENT mode is lit when the compressor is turned off. The interior brightness control might have to be adjusted to the highest setting during the day in order to see the indicator lamp. VENT does not operate in the FRONT defrost mode. RECIRC (Recirculation): Press this button to turn this mode on or off. RECIRC limits the amount of outside air coming into the vehicle and recirculates most of the air inside your vehicle. It can be used to prevent outside air and odors from entering the vehicle or to quickly heat or cool the air inside the vehicle. When this button is pressed an indicator light will come on. The interior brightness control might have to be adjusted to the highest setting during the day in order to see the indicator lamp. This setting will not operate in FRONT defrost mode and is only operational in WINDSHIELD/FLOOR mode if the compressor is turned on. On hot days, open the windows to let hot air inside escape; then close them. This helps to reduce the time it takes for the vehicle to cool down. It also helps the system to operate more efficiently. For quick cool down on hot days, press the AUTO button. The system will automatically enter the recirculation mode where the temperature will be at the full cold position for maximum cooling. The air-conditioning system removes moisture from the air, so a small amount of water dripping underneath the vehicle while it is idling or after the engine is turned off is normal. Operating the climate control system in the RECIRC mode may cause fogging of the vehicle's windows when the weather is cold and damp. To clear the fog, select either WINDSHIELD/FLOOR or defrost mode and increase the speed. 3-23