Test A: Incorrect/Erratic Direction of Airflow From Outlet(s)

PINPOINT TEST A: INCORRECT/ERRATIC DIRECTION OF AIRFLOW FROM OUTLET(S)

A1-A2:

A3:

A4-A6:

A6-A8:

A8-A10:

A10-A12:

A12-A13:

Normal Operation
Under normal operation, the function selector switch is provided vacuum from the engine. When a position is selected, vacuum is applied to the desired vacuum control motor that is connected to the mode door you want to control.

Possible Causes
- Function selector switch
- Heater control valve
- Vacuum control motor
- Stuck or bound linkage or door
- Leaking or plugged vacuum hose