Heating and ventilation (Description): Description and operation

Description

General

The heating and ventilation system controls the temperature and distribution of air supplied to the vehicle interior. Air is drawn into a heater assembly through a connector hose and an air inlet duct or, on vehicles with air conditioning, the cooling unit. AIR CONDITIONING, DESCRIPTION AND OPERATION, Description.

In the heater assembly, the air can be heated and supplied as required to fascia and floor level outlets. An electrical variable speed blower, and/or ram effect when the vehicle is in forward motion, forces the air through the system. Temperature, distribution and blower controls are installed on a panel on the centre console.

Up to 2002 MY, diesel models in colder climate markets incorporate a Fuel Burning Heater (FBH) in the engine coolant supply to the heater assembly. From 2002 MY, only diesel models in the coldest of those markets retain the FBH; diesel models in the remainder of those markets incorporate an electric Positive Temperature Coefficient (PTC) heater, inside the heater assembly, instead of the FBH.

Air Inlet Duct

RHD (non aircon) shown, LHD (non aircon) similar

1 Air inlet duct 2 Connector hose

3 Pollen filter 4 Foam block

The air inlet duct connects the passenger's side of the plenum to the heater assembly, to provide the fresh air inlet. The upper end of the duct locates in a slot in the body and the lower end of the duct is connected to the heater assembly via a corrugated connector hose. A pollen filter is installed in the air inlet duct and retained by two scrivets.