2004 Buick Rendezvous Owner's Manual - Page 169

Operation Turn the right knob clockwise or counterclockwise to direct the airflow inside your vehicle. To change the current mode, select one of the following: 9 (Fan): Turn the left knob clockwise or counterclockwise to increase or decrease the fan speed. Turn the knob to 0 to turn off the fan. The fan must be turned on for the air conditioning compressor to operate. This mode keeps outside air from coming in the vehicle. It can be used to prevent outside air and odors from entering your vehicle or help heat or cool the air inside your vehicle more quickly. Press this button to turn the recirculation mode on or off. When the button is pressed, an indicator light will come on. The air-conditioning compressor also comes on. The recirculation mode can be used with vent and bi-level modes, but it cannot be used with floor, defog, defrost or outside air modes. Temperature Control: Turn the center knob clockwise or counterclockwise to increase or decrease the air temperature inside your vehicle. H (Vent): This mode directs air to the instrument panel outlets. @ (Recirculation): ) (Bi-Level): This mode directs half of the air to the instrument panel outlets, then directs the remaining air to the floor outlets. Cooler air is directed to the upper outlets and warmer air to the floor outlets. This mode directs most of the air to the floor outlets. Use this mode to send air to the rear of the vehicle. Keep the area under the front seats free of objects that could obstruct airflow to the rear of the vehicle. The right knob can also be used to select defog or defrost mode. For more information, see "Defogging and Defrosting" later in this section. 6 (Floor): 3-29