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Home >> Ford >> 2007 >> E 150 V8-5.4L >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Pinpoint Tests >> Test A: Incorrect/Erratic Direction of Airflow From Outlets
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Test A: Incorrect/Erratic Direction of Airflow From Outlets

PINPOINT TEST A: INCORRECT/ERRATIC DIRECTION OF AIRFLOW FROM OUTLETS


A1-A2:






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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
- Vacuum check valve
- Vacuum hose
- Vacuum reservoir
- Vacuum control motor
- Function selector switch
- Air distribution door/linkage
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