2000 Chevrolet Impala Owner's Manual - Page 148

yellowblue Mode Knob The knob on the right side of the control panel has several settings to control the direction of airflow: UPPER: This setting directs air through the instrument panel outlets. BI-LEV: This setting directs air two ways. Half of the air is directed through the instrument panel outlets. Most of the remaining air is directed through the floor vents and a little to the windshield defroster and side window outlets. LOWER: This setting sends most of the air through the ducts near the floor. The remaining air comes out of the defroster and side window outlets. DEFOG: This setting sends half of the air to the floor ducts and half to the defroster and side window outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). Air inlet will also be automatically set to outside air. The RECIRCULATION button will not be selectable in this mode. DEFROST: This setting directs most of the air through the defroster and side window vents. Some of the air also goes to the floor ducts. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). The air inlet will also be automatically set to outside air. The RECIRCULATION button will not be selectable in this mode. OUTSIDE AIR: Press this button to force the system to use outside air. This button is usable in all of the mode settings. An indicator on the button will light up when this button is selected. RECIRCULATION: Press this button to limit the amount of fresh air entering your vehicle. This is helpful when you are trying to limit odors entering your vehicle. This button is usable in UPPER, LOWER and BI-LEVEL modes. An indictor on the button will light up when this button is selected. A/C: Press this button to turn the air conditioning on and off. The system will cool and dehumidify the air inside the vehicle when the A/C light is on. 3-5