2007 Pontiac Grand Prix Owner's Manual - Page 160

Air Conditioning # (Air Conditioner): Press this button to turn the air conditioning compressor on or off. An indicator light to the right of the button will come on. This button has no control over the air conditioning compressor when in Floor/Defog and Defrost modes. The instrument panel brightness control may have to be adjusted to the highest setting in order to see the indicator. See Instrument Panel Brightness on page 147 for additional information. On hot days during the vehicle's initial start-up, open the windows to let hot inside air escape; then close them. This helps to reduce the time it takes for the vehicle to cool down. It also helps the system to operate more efficiently. For quicker cool down on hot days, do the following: 1. Select any mode setting between vent and the setting before defrost. 2. Select the air conditioner. 3. Select the coolest temperature. 4. Select the highest climate control fan speed. 160 Using these settings will set recirculation for quicker cool down (the light indicator will not turn on). If outside air is desired, press the recirculation button twice. Using these settings together for long periods of time may cause the air inside the vehicle to become too dry. To prevent this from happening, after five minutes the recirculation door will open slightly to allow some outside air into the vehicle. The air conditioning system removes moisture from the air, so sometimes there may be a small amount of water dripping underneath the vehicle while it is idling or after the engine is turned off. This is normal. Recirculation h (Recirculation): Press this button to activate the recirculation mode. With this selection, inside air is recirculated into the vehicle. This mode reduces outside air and odors from entering the vehicle. It may also help to heat or cool the air inside the vehicle more quickly.