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

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

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.

This pinpoint test is intended to diagnose the following:
- Function selector switch
- Heater control valve
- Vacuum control motor
- Stuck or bound linkage or door
- Leaking or plugged vacuum hose

A1:

A2-A3:

A3-A5:

A5-A7:

A7-A8:

A9-A11:

A11-A12:

A13: