The heater system provides heating, ram air, power ventilation, and the windshield defrosting. The blower fan draws outside air from the plenum at the base of the windshield into the heater module. The forward movement of the vehicle forces additional outside air, or ram air, into the heater module. Within the heater module, the air is heated. The heated air is routed through the ducts to the proper outlets for discharge into the passenger compartment. A control assembly in the instrument panel allows the operator to control the blower speed, the mode of operation, and the temperature of the air coming from the heater system.

The heater module contains components that heat the air, and direct the air to the proper ducts and outlets. The components are enclosed inside a two part housing. The front housing mounts to the front of the cowl panel in the engine compartment. The rear housing mounts to the rear of the cowl panel in the passenger compartment under the instrument panel.