Auxiliary Climate Control: Overview

Auxiliary climate control is an available feature on this vehicle. The auxiliary climate control system operation is determined by the settings on the front Heating Ventilation Air Conditioning(HVAC) control panel selection or from the Rear Heating Ventilation Air Conditioning(RHVAC) control panel selection. The rear auxiliary climate controls are located on the rear of the center console.

The auxiliary climate control system consist of the following components:

• Auxiliary blower motor
• Auxiliary blower motor speed control
• Auxiliary coolant pump
• Auxiliary evaporator core
• Auxiliary heater core
• Auxiliary heater core and evaporator core housing
• Auxiliary heater and refrigerant lines
• Auxiliary mode door actuator
• Auxiliary temperature blend door actuator
• HVAC control module
• RHVAC control module
• Auxiliary Thermostatic Expansion Valve(TXV)

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 system.
• Air is cooled and dehumidified by the auxiliary Air Conditioning(A/C) evaporator core only if the front (main) climate control system is operating in a mode that requires A/C compressor operation.
• The auxiliary temperature blend door and the auxiliary mode door are controlled by electric actuator motors.
• Movement of the auxiliary temperature control between cool and warm causes a corresponding movement of the auxiliary temperature blend door to mix air flowing through and around the auxiliary heater core.
• Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the auxiliary mode door to direct airflow between the panel (headliner) registers and the floor duct.
• The auxiliary coolant pump circulates coolant to the auxiliary heater core.