2003 Buick Regal Owner's Manual - Page 129
2003 Buick Regal Manual
Page 129 highlights
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 use to prevent outside air and odors from entering your vehicle or to quickly heat or cool the air inside your vehicle. When this button is pressed an indicator light will come on. You may have to adjust the interior brightness control to the highest setting during the day in order to see the indicator lamp. This setting is not permitted in FRONT defrost mode and is only permitted in WINDSHIELD/FLOOR mode if the compressor is turned on. On hot days, open the window to let hot inside 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 the recirculation mode and the temperature will be at the full cold position for maximum cooling. 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. 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 WINDSHIELD mode and increase the speed. 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. 3-24