1997 Buick Century Owner's Manual - Page 146

Comfort Controls Manual Single Zone Climate Control - Temperature Knob . The center knob changes the temperature of the air coming through the system.Turn this knob toward red (clockwise) for warmer air. Turn it toward blue (counterclockwise) for cooler air. Mode Knob The right knob has several settings to controlthe direction of airflow: 0 I I COMFORT CONTROL I l MAX: This setting recirculates much of the air inside your vehicle and sends it through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40°F (4°C). (Even when the compressor is running, you can control the temperature.) With this system, you can control the heating, cooling and ventilation in your vehicle. The system works best if you keep your windows closed while using it. Fan Knob The left knob selects the amount of air you want. To turn the fan off, turn the knob to OFF. If the airflow seems very low when the fm knob is turned to the highest setting, regardless of the mode setting, your passenger compartment air filter may need to be replaced. See "Maintenance Schedule" in the Index. NORM: This setting brings in outside air and sends it through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40°F (4°C).(Even when the compressor is running, you can control the temperature.) 3-2