Test G: Incorrect/Erratic Direction of Air Flow From Outlet - Manual Climate Control

PINPOINT TEST G: INCORRECT/ERRATIC DIRECTION OF AIR FLOW FROM OUTLET - MANUAL CLIMATE CONTROL

G1:

G1-G4:

G4-G6:

G7-G8:

G9-G10:

G11-G13:

G13-G14:

G15:

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