System Airflow
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
The auxiliary A/C and heating system has the following features:
- The auxiliary A/C and heating system is functioning whenever the instrument panel mounted A/C control is in any position except OFF.
- The auxiliary blower motor (18527) recirculates the air inside the vehicle. Outside air is not available to the auxiliary system.
- Air is cooled and dehumidified by the auxiliary A/C evaporator core (19860) only if the instrument panel mounted A/C control is adjusted to a position that requires A/C compressor (19703) operation.
- The temperature blend door and the mode door are controlled by electric actuator motors (19E616).
- Movement of the auxiliary temperature control between COOL and WARM causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core (18476).
- Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the mode door to direct air flow between the panel (headliner) registers and the floor duct.