2009 Buick LaCrosse Owner's Manual - Page 145

- (Defog): This mode clears the windows of fog or moisture. Air is divided between the windshield and the side window outlets, and the floor outlets. In this mode, the system turns recirculation off and runs the air conditioning compressor unless the outside temperature is near or below freezing. Pressing the recirculation button will have no effect other than turning on the indicator light while in defog mode. This mode clears the windows of fog or frost more quickly. Air is directed to the windshield and the side window outlets, with some air directed to the floor outlets. In this mode, the system turns recirculation off and runs the air conditioning compressor unless the outside temperature is near or below freezing. Pressing the recirculation button will have no effect other than turning on the indicator light while in defrost mode. 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 2. 3. 0 (Defrost): H mode. Press h . Press # . 4. Select the coolest temperature. 5. Select the highest fan speed. The air conditioning system removes moisture from the air, so a small amount of water might drip under the vehicle while idling or after turning off the engine. This is normal. Using these settings together for long periods of time may cause the air inside the vehicle to become too dry. To prevent this, after five minutes recirculate will allow some outside air into the vehicle. # (Air Conditioning): Press to turn the air conditioning system on or off. An indicator light turns on to show that the air conditioning is on. Air conditioning can be selected in any mode as long as the fan switch is on. The indicator light changes with each button press even when conditions prevent operation. 3-23