1998 Buick Century Owner's Manual - Page 151

RECIRC: This setting recirculatesmuch of the air inside your vehicle. This setting is not permitted in FRONT defrostmode and is only permittedin WINDSHIELD/FLOOR mode if the compressor is turned on. The indicator light be litwhen will recirculation is engaged, but will light for onesecond and then turn off if selected when not permitted. Air Conditioning On very hot days, open the windows long enough to let hot, inside air escape. This reduces time for the the vehicle to cool down. For a quickcool-down on very hot days, use MAX with the temperature knobs all the way in the blue area. If this setting is used for long periodsof time, the air in your vehicle may become too dry. For normal cooling on hot days, use NORM with the temperature knobs in the blue area.The system will bring in outside air and cool it. On cool, but sunny days, the sun may warm your upper body, but your lower body may not be warm enough. You can use BI-LEV and set the temperature knob to a comfortable setting. Thesystem will bring in outside air and direct it to your upper body, while sending slightly warmed air to your lower body. You may notice this temperature differencemore at some times than others. Heating On cold days, use HTR with the temperature knobs all the way in the red area. The system will bring in outside air, heat it and send it to the floor ducts. If your vehicle has an engine coolantheater, you can use it to help your system provide warm air fasterwhen it's cold outside(0°F (- 18°C) or lower).An engine coolant heater warms the coolantyour engine and heating system use to provide heat. See"Engine Coolant Heater" in the Index. Defogging and Defrosting Your system has two settings for clearing front and the side windows. To defrost thewindows quickly, press the FRONT button; set the temperature to 90 O F (32"C), select highfan speed and turn the DUAL button off. To warm passengers while keeping the windows clear, push the AIR FLOW button until WINDSHIELDFLOOR appears in the display. Select fanspeed for comfort and windshield clearing performance. 3-9