1998 Buick Century Owner's Manual - Page 145

BI-LEV: This setting brings in outside air and directs it through the two ways. Half of the air is directed instrument panel outlets. Most of the remaining air is directed through the floor ducts a little to defrost and the and side window vents. The air conditioningcompressor will run automatically in this setting unless the outside temperature is below 40°F (4°C). VENT This settingbrings in outside air and directs it through the instrument panel outlets. Air Conditioning On very hot days, open the wlnaows long enough to let hot, inside air escape. This reduces the time for the vehicle to cool down. For a quickcool-down on very hot days, use MAX with the temperature knob all the way in the blue area.If this setting isused for longperiods of time, the air in your vehicle may become too dry. For normal cooling on hot days, use NORM with the temperature knob in the blue area. The system will bring in outside airand 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. The system 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. HTR: This setting sendsmost of the air through the ducts near the floor. The rest comes out of the defroster and side window vents. BLEND: This setting allows half of the air to go to the floor ductsand half to the defroster and side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40°F (4°C). 9FRONT: This setting directsmost of the air through the defrosterand side window vents. Some of the air also goes to the floor ducts. The air conditioning compressor will run automatically in this settingunless the outside temperature is below 40°F (4°C). 3-3