2001 Buick Century Owner's Manual - Page 153

RECIRC: This setting recirculates much of the air inside your vehicle. This setting is not permitted in FRONT defrost mode and is only permitted in WINDSHIELD/FLOOR mode if the compressor is turned on. The indicator light will be lit when recirculation is engaged, but will light briefly and then turn off if selected when not permitted. 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, switch the system to either WINDSHIELD/FLOOR or WINDSHIELD mode and increase the fan speed. To avoid re-fogging of the windows, operate the system with RECIRC disengaged. Defogging and Defrosting If you have the DUAL COMFORTEMP CLIMATE CONTROL, your system has two settings for clearing the front and side windows. To defrost the windows quickly, press the DEF button with the temperature knob all the way in the red area. For maximum defroster performance, set both driver and passenger temperature controls to the warmest setting. To warm passengers while keeping the windows clear, use BLEND. If you have the DUAL AUTOMATIC COMFORTEMP CLIMATE CONTROL, your system has two settings for clearing the front and side windows. To defrost the windows quickly, press the FRONT button; set the temperature to 90 _F (32_C), select high fan speed and turn the DUAL button off. To warm passengers while keeping the windows clear, push the AIR FLOW button until WINDSHIELD/FLOOR appears in the display. Select fan speed for comfort and windshield clearing performance. 3-7