2004 Buick Century Owner's Manual - Page 120

Climate Controls Dual Climate Control System The vehicle may have this climate control system. The heating, cooling, and ventilation for the vehicle can be controlled with it. Manual Operation To change the current mode, select one of the following settings on the right knob. MAX (Maximum Air-Conditioning): This mode recirculates much of the air inside the 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). VENT (Ventilation): This mode brings in outside air and directs it through the instrument panel outlets. BI-LEV (Bi-Level): This mode directs approximately half of the air to the instrument panel outlets, and then directs most of the remaining air to the floor outlets. Some air may be directed toward the windshield. HTR (Heater): This mode directs most of the air to the floor outlets, with some air directed to the outboard outlets, for the side windows, and some air directed to the windshield. 3-18