1999 Pontiac Bonneville Owner's Manual - Page 152

First Edition for Pontiac Bonneville Owner's Manual - 1999 yellowblue Air Conditioning On hot days, open the windows long enough to let hot inside air escape. This reduces the time it takes for your vehicle to cool down. Then keep your windows closed for the air conditioner to work its best. If you have the standard system, for quick cool-down on very hot days, use MAX with the temperature knob in the blue area. If this setting is used for long periods of time, the air in your vehicle may become too cold and dry. For normal cooling on hot days, use A/C with the temperature knob in the blue area. This setting cools the air entering your vehicle and directs it through the instrument panel outlets. If you have the electronic system, press the A/C button to turn the system on. The system will cool and dehumidify the air inside the vehicle. Also while in AUTO mode, the system will use RECIRC as necessary to cool the air. On cool, but sunny days, with the standard system or through manual operation of the electronic system, use BI-LEVEL to deliver warm air to the floor and cooler air to the middle instrument panel outlets. To warm or cool the air delivered, push the TEMP button up or down. When the air conditioning system is in AUTO mode, the A/C light will always be on. When the ambient temperature outside the vehicle reaches 40_F (4_C), the compressor will remain on continuously. Heating If you have the standard system, on cold days use HEATER with the temperature knob in the red area. If you have the electronic system, press AUTO and adjust the temperature by pressing the TEMP up or down button. You may also adjust the electronic system manually by pressing the MODE button and selecting HEAT. Again, adjust the temperature by pressing the TEMP up or down button. With each system, outside air will be brought in and sent through the floor outlets. The heater works best if you keep your windows closed while using it. 3-6