2000 Buick Regal Owner's Manual - Page 149

Hot Weather Example: When you start the vehicle in hot weather, 80_F (27_C), or after being parked during the day in full sun, if your driver set temperature is 75_F (24_C) and you are in full automatic mode, the system will automatically move the temperature to full cold. The fan will be at low speed momentarily and then go to the high speed. The air intake will be recirculated for maximum cooling performance. As the interior of the vehicle cools down to your desired comfort point, the fan speed will decrease and the temperature will move to a warmer position to maintain your desired comfort. As the interior cools down or the sun load decreases the system could switch to air delivered to A/C vents and the floor. Cold Weather Example: When you start the vehicle in cold weather, (below freezing) or after being parked overnight. If your Driver Set Temperature is 75_F (24_C) and you are in Full Automatic mode, the system will automatically move the temperature doors to full hot. The fan will start out at a low speed and will increase to a higher speed as the engine warms up. The air will be delivered to the floor. As the the interior of the vehicle warms up to your desired comfort point, the fan speed will decrease and the temperature will move to a cooler position to maintain your desired comfort. As the cabin warms up or the sun load increases the system could switch to air delivered to the windshield and the floor (DEFOG mode). Manual Control If you prefer to manually control the heating, cooling and ventilation in your vehicle, you can select airflow direction, fan speed, outside or recirculated air, air compressor and temperature operation with the following buttons: AIR FLOW: This control has several settings to control the direction of airflow when the system is not in AUTO. To access the various modes available, continue to press the AIR FLOW rocker button up or down until the desired mode appears in the display: D WINDSHIELD/FLOOR: This setting directs half of the air to the floor ducts and 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). D MID/FLOOR: This setting directs half of the air through the instrument panel outlets. Most of the remaining air is directed through the floor ducts and a little to the defroster and side window vents. panel outlets. D MID: This setting directs air through the instrument 3-6