Description - Heater And Air Conditioner

A manually controlled single zone type heating-air conditioning system is available on this model.

All vehicles are equipped with a common heater, ventilation and air conditioning (HVAC) housing ( Fig 1). The system combines air conditioning, heating, and ventilating capabilities in a single HVAC housing mounted within the passenger compartment under the instrument panel. The HVAC housing includes:

• Blower motor
• Blower motor resistor block
• Heater core
• A/C evaporator
• Evaporator temperature sensor
• Blend door and actuator
• Mode doors and actuator
• Recirculation door and actuator
  Fig 1: Identifying HVAC Housing

  Courtesy of DAIMLERCHRYSLER CORP.

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

• Defroster Outlet  - A single large defroster outlet is located in the center of the instrument panel top cover, near the base of the windshield.
• Side Window Demister Outlets  - There are two side window demister outlets, one is located at each outboard end of the instrument panel top cover, near the belt line at the A-pillars.
• Panel Outlets  - There are six panel outlets in the instrument panel, one located near each outboard end of the instrument panel facing the rear of the vehicle and two located at each side of the instrument panel center bezel.
• Front Floor Outlets  - There are two front floor outlets, one located above each side of the floor panel center tunnel near the dash panel.