1999 Chevrolet Astro Owner's Manual - Page 142

yellowblue Comfort Controls This section tells you how to make your air system work for you. Your comfort control system uses ozone-friendly R-134a refrigerant. With these systems, you can control the heating, cooling and ventilation in your vehicle. Your vehicle also has a flow-through ventilation system described later in this section. Fan Knob This control has four positions. To increase airflow, turn the knob toward HI. To decrease airflow, move it toward LO. Temperature Knob This knob is next to the fan knob. It controls the temperature of the air flowing into your vehicle. Turn the knob clockwise for warmer air. Turn the knob counterclockwise for cooler air. Function Knob This knob is next to the temperature knob. OFF: This setting turns the system off. MAX A/C: This cools the air the fastest, by recirculating the inside air. Turn the temperature knob all the way to MAX A/C. A/C: This setting brings in outside air and cools it. Heating/Air Conditioning System If your vehicle has air conditioning, your heating/air conditioning controls will look like this. 3-2