Corvette V8-5.7L VIN G (1997)
Housing Assembly HVAC: Description and Operation
SYSTEM DESCRIPTION
Vacuum regulates air flow through the system. Depending on the mode selected, the mode valves mix and direct either cooled, heated, or outside air
through the air ducts. The various modes of operation are as follows:
1. RECIRC AIR - limits the amount of fresh air entering the vehicle by recirculating most of the air inside the vehicle. This setting helps cool the air
quickly and helps to limit odors from entering the vehicle. The air is delivered through the Instrument Panel (I/P) outlets.
2. OUTSIDE AIR - fresh air is drawn in from the outside and is delivered through the I/P outlets. This setting is used while defrosting or defogging
the windows to help clear moisture.
3. BI/LEVEL - air is drawn from the outside and is directed into the vehicle in two ways. Cooler air is directed toward the upper body through the I/P
outlets, while warmer air is directed through the lower outlets.
4. UPPER - most of the air is directed through the I/P outlets with a very small amount of the air directed to the lower outlets.
5. LOWER- most of the air is directed through the lower ducts to the floor area of the vehicle, with some of the air also being directed toward the
windshield and the side window vents.
