HVAC System Component Overview

HVAC System Component Overview

A manual temperature control front single zone type heating, ventilation and air conditioning system, a MTC front dual zone and rear HVAC system and an automatic temperature control front dual zone and rear HVAC system are available on this vehicle.

To maintain the performance level of the HVAC system, the engine cooling system must be properly maintained. The use of a bug screen is not recommended. Any obstructions in front of the radiator or A/C condenser will reduce the performance of the A/C and engine cooling systems.

The engine cooling system includes the radiator, thermostat, radiator hoses and the engine coolant pump. Refer to engine cooling system information before opening or attempting any service to the engine cooling system.

All vehicles are equipped with a common front HVAC housing. The front HVAC system combines A/C, heating, and ventilating capabilities in a single housing mounted within the passenger compartment under the instrument panel. The front HVAC housing includes:






1 HVAC Housing

2 A/C Evaporator

3 Blend-air door and actuator (dual zone passenger side)

4 Recirculation-air door and actuator

5 Evaporator temperature sensor

6 Blower motor

7 Blower motor resistor (MTC) or blower motor power module (ATC)

8 Mode-air doors and actuator

9 Heater core

10 Blend-air door and actuator (single zone or dual zone driver side)

Based upon the mode selected, conditioned air can exit the front HVAC housing through one or a combination of the three main housing outlets: defrost, panel or floor. The defrost outlets are located on the top of the HVAC housing, the panel outlets are located on the top of the HVAC housing and the floor outlets are located on the bottom of the HVAC housing. Once the conditioned air exits the HVAC housing, it is further directed through molded plastic ducts to the outlets within the vehicle interior. These outlets and their locations are as follows:

• Defroster Outlet - Two large defroster outlets are located near the center of the instrument panel top cover, near the base of the windshield.

• Side Window Outlets - There are two side window outlets, one is located in each instrument panel end cap, near the belt line at the A-pillars.

• Panel Outlets - There are four air outlets in the instrument panel, one located near each outboard end of the instrument panel facing the rear of the vehicle and two located in instrument panel center bezel.

• Floor Outlets - There are four floor outlets, one located above each side of the floor panel center tunnel near the dash panel and one behind each front seat.