System Airflow

Fig 1: Auxiliary System Air Distribution

Courtesy of FORD MOTOR CO.

The auxiliary climate control system has the following features:

• The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary climate control system.
• Air is cooled and dehumidified by the auxiliary evaporator core only if the DATC is adjusted to a position that requires A/C compressor (19D629) operation.
• The temperature blend door and the air distribution door are controlled by electronic 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.
• Toggling of the auxiliary air distribution control between PANEL and FLOOR causes a corresponding movement of the air distribution door to direct airflow between the panel (headliner) registers and the floor duct.