2005 Ford Econoline E150, Van Cargo, 5.4 LFACTORY OEM SERVICE PROCEDURE

Max A/C

Fig 1: System Airflow Description Diagram (MAX A/C)
G03889857Courtesy of FORD MOTOR CO.

When MAX A/C is selected:

  • The recirculation air duct door is at full vacuum, closing off outside air and admitting only recirculated air.
  • The floor/panel door and the floor/defrost door are at the full vacuum position, directing airflow to the A/C register (19893).
  • The temperature is usually set for maximum cold but may be heated if desired.
  • Air will be picked up at the recirculation opening by the blower motor (19805). With the A/C control set for maximum cold, airflow across the evaporator core (19860) will be diverted past the heater core (18476) and then directed into the passenger compartment through the instrument panel A/C register. There is also some airflow to the side window demisters.
  • The A/C compressor (19703) will be enabled when MAX A/C is selected.
  • The blower motor is on.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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