Air Distribution

There are two sources of air available to the air distribution system:
- outside air
- recirculated air

Recirculated air is only used during MAX A/C. Air distribution within the vehicle is determined by the function selector switch position. Airflow control doors are used to direct airflow within the air plenum chamber. Vacuum control motors are used to position these airflow control doors.

The air distribution system is designed to provide airflow from the defrost
nozzle when no vacuum is applied to any of the vacuum control motors. This is
done to prevent a situation where defrost cannot be obtained due to a system
vacuum leak.

Air enters the passenger compartment from the:
- instrument panel A/C register.
- heater outlet floor duct.
- windshield defroster hose nozzle.
- side window demisters.

Passenger compartment air is exhausted from the Vehicle through open windows or body air vents.