1999 Buick Park Avenue Owner's Manual - Page 156

yellowblue Automatic Operation Press the AUTO button when you want the system to automatically adjust to changes in the temperature. When the system is set for automatic operation, air will come from the floor, middle or windshield outlets depending on the temperature inside the vehicle, the outside temperature and sun load. Fan speed will vary as the system gets to and maintains the comfort setting you have selected through the use of the TEMP button. To find your comfort setting, start with the system in AUTO mode and the TEMP button adjusted to a display of 75_F (24_C), give the vehicle about 20 minutes to stabilize, and adjust your comfort setting if necessary, by using the TEMP button. The display will show the comfort setting, fan speed and airflow direction for a few seconds, and then it will display the outside temperature. In cold weather, the system will delay turning the fan on high, to avoid blowing cold air. The length of the delay depends on the engine coolant temperature and the outside temperature. Pushing the FAN, AIR FLOW or FRONT buttons will override this delay, turn off the AUTO setting and change the fan speed. Manual Operation You may also manually adjust the air delivery or fan speed. AIR FLOW: This button is used to change the direction of the airflow. The airflow choices available are FLOOR, FLOOR-MID, MID and WINDSHIELD-FLOOR. If the system is set for AUTO, pressing the AIR FLOW button will display the current airflow direction, the comfort setting and the fan speed. Press the AIR FLOW up or down button again to change the direction of the airflow. If the AIR FLOW up button is selected while in the FRONT defrost mode, the system will direct the air toward the mid-position. If the AIR FLOW down button is selected while in the FRONT defrost mode, the system will direct the air toward the FLOOR, and the FRONT defrost mode will cancel. Notice the arrows in the display. OFF: If the passenger comfort control is turned on, it can be turned off by pressing the OFF button once. Pressing the OFF button a second time will turn off the main system. Turning off the main system causes the fan to turn off and the airflow to be directed to the floor. The system will still try to keep the interior of the vehicle at the previous chosen comfort setting. The outside temperature will show on the display when the system is off. 3-4