2009 Chevrolet Impala Owner's Manual - Page 143
2009 Chevrolet Impala Manual
Page 143 highlights
6 (Floor): Air is directed to the floor outlets, with some of the air directed to the windshield and side window outlets. In this mode, the system automatically selects outside air. - (Defog): This mode clears the windshield of fog or moisture. Air is directed equally to the windshield and the floor outlets. When defog is selected, the system turns off recirculation and runs the air conditioning compressor unless the outside temperature is below 40°F (4°C). 0 (Defrost): This mode clears the windshield of fog or frost more quickly. Air is directed to the windshield with some air to the side window vents and the floor vents. When defrost is selected, the system automatically forces outside air into the vehicle. The air conditioning compressor will run automatically in this setting, unless the outside temperature is below 40°F (4°C). # (Air Conditioning): Press to turn the air conditioning system on or off. An indicator light comes on to show that it is on. The air conditioning can be selected in any mode as long as the fan is on and the outside temperature is above freezing. A flashing indicator light indicates that the air conditioning compressor is currently not available. On hot days, 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 quick cool down on hot days, do the following: 1. Select the 2. H mode. Press the # button. 9 speed. 3. Select the coolest temperature for both zones. 4. Select the highest 5. When the coolest temperature is selected in the A/C mode, the system automatically goes into the recirculation mode to improve cooling. 3-21