1999 Chevrolet Monte Carlo Owner's Manual - Page 127

yellowblue Mode Knob The left knob has several settings to control the direction of airflow. For each setting, set the temperature to a comfortable setting. MAX: This setting recirculates much of the air inside your vehicle and sends it through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4.5_C). (Even when the compressor is running, you can control the temperature). A/C: This setting brings in outside air and directs it through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4.5_C). (Even when the compressor is running, you can control the temperature). BI-LEVEL: This setting brings in the outside air and directs it two ways. Half of the air is directed through the instrument panel outlets. Most of the remaining air is directed through the floor ducts and a little to the defrost and side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4.5_C). (Even when the compressor is running, you can control the temperature). VENT: This setting brings in outside air and directs it through the instrument panel outlets. FLOOR: This setting sends most of the air through the ducts near the floor. The rest comes out of the defrost and side window vents. DEFOG: This setting allows half of the air to go to the floor ducts and half to the defrost and side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4.5_C). (Even when the compressor is running, you can control the temperature). DEFROST: This setting directs most of the air through the defrost and side window vents. Some of the air goes to the floor ducts. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4.5_C). (Even when the compressor is running, you can control the temperature). Air Conditioning On very hot days, open the windows long enough to let hot, inside air escape. This reduces the A/C compressor load, which should help fuel economy. 3-3