Auxiliary System Airflow

The auxiliary climate control system has the following features:

• A vertical air distribution duct supplies air to the integral headliner air distribution duct. Airflow is then directed to the passengers through adjustable registers. The heater floor duct supplies air to a fixed register, which is integral to the side trim panel.
• 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 main (front) climate control assembly is adjusted to a position that requires A/C  compressor operation.
• The temperature blend door and the airflow mode door are controlled by electric actuator motors.
• Movement of the auxiliary temperature/mode 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. Selection of the auxiliary mode control buttons causes a corresponding movement of the mode door to direct airflow to the ROOF and FLOOR positions.