Heating and ventilation (Operation): Description and operation (page 2 of 2)

Air drawn through the intake below the windscreen, passes through a heater duct into the heater unit to enter the interior of the car through fascia vents, via a moulded heater duct in the fascia.

When the temperature control is rotated towards the heated air position it opens a heater valve in the engine cooling system allowing hot coolant from the engine to circulate through the heater matrix.

The distribution of air entering the car through the heater is dependent on the positions of distribution flaps inside the heater unit.

The distribution flaps are adjusted by rotation of the distribution control to direct the air in various proportions to the vents at face level, foot level and the windscreen.

When the blower switch is switched off, the volume of air entering the blower unit depends on the ram effect of the car’s forward motion. Four fan speeds are available on the switch to supplement the ram effect.

Operation of the thumb-wheel in either, the side or centre face level vents will open or close the vents.