2004 Chevrolet Corvette Owner's Manual - Page 141

? (Recirculation): This mode keeps outside air from coming in the vehicle. It can be used to prevent outside air and odors from entering your vehicle or to help 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 air-conditioning compressor also comes on. The recirculation mode cannot be used with the outside air mode. When in the AUTO mode, the system automatically selects recirculation to cool the vehicle's temperature. By pressing this button, the system will lock into recirculation mode. Any adjustment to the air intake must then be made manually. Recirculation is not available when using the defrost or defog mode because outside air is needed to reduce moisture inside of the vehicle. Operating the system in the recirculation mode may cause fogging of the vehicle's windows when the weather is cold and damp. To clear the fog, switch the system to either the defog or defrost mode and increase the fan speed. To avoid re-fogging of the windows, operate the system in the outside air mode. Temperature Control: The DRIVER knob changes the temperature on the driver's and passenger's side of the vehicle. Turn the knob clockwise or counterclockwise to manually increase or decrease the temperature inside your vehicle. Whenever you turn this knob, the temperature will be displayed for about five seconds along with the current fan speed and air delivery mode. The PASSENGER knob changes the temperature on the passenger's side of the vehicle. When the knob is in the 12 o'clock position, the passenger's temperature is the same as the driver's. Turn the knob clockwise for warmer air on the passenger's side or counterclockwise for cooler air. If the driver-set temperature is set at full cold 60°F (16°C) or full hot 90°F (32°C), turning the PASSENGER knob has no effect because the system is locked at a maximum setting. 3-27