1999 Pontiac Montana Owner's Manual - Page 203

yellowblue Air Conditioning DEFOG: This setting directs air to the windshield and through the floor ducts. This mode is particularly useful during cold or inclement weather because of your vehicle's larger windshield area. DEFROST: This setting directs most of the air to the windshield and side window vents. Mode Buttons RECIRCULATION: Press this button (the light will glow) to limit the amount of fresh air entering your vehicle by recirculating much of the air inside your vehicle. You may use this setting to limit odors entering your vehicle. Press the OUTSIDE AIR button (the light on the RECIRCULATION button will go off) to let outside air circulate into the vehicle. OUTSIDE AIR: Press this button (the light will glow) to send outside air into your vehicle. Using this setting while trying to defrost or defog the windows will help clear the vents of moisture. Press the RECIRCULATION button (the light on the OUTSIDE AIR button will go off) to limit outside air entering the vehicle. When the DEFOG or DEFROST setting is selected, the system will automatically go to OUTSIDE AIR mode. On very hot days, your vehicle will cool down more quickly and economically if you open the windows long enough to let hot, inside air escape. For all settings, adjust the temperature control knob and fan speed as desired. To get maximum cooling or a quick cool-down on very hot days, press the A/C and RECIRCULATION buttons (the lights will glow) and turn the temperature knob counterclockwise (toward the blue area). Adjust the mode knob to direct the air to the desired location. This setting should not be used for long periods of time because the air may become too cold and dry. Push the A/C button again (the light will go off) to turn off the air conditioning. When the air conditioner compressor is on, you may sometimes notice slight changes in your vehicle's engine performance and power. This is normal. The system is designed to help fuel economy while it maintains the desired cooling level. The air conditioner removes moisture from the air, so you may sometimes notice water dripping from under your vehicle's engine compartment when it is idling or after it has been turned off. This is normal. 3-3