2. Air distribution control (Heating and ventilation)
- Make
- Land Rover
- Model
- Defender 90 Workshop Manual (NAS)
- Section
- Description and operation › 2. Air distribution control
HEATER OPERATION through a ducted vent on top of the vehicle front wing to the blower motor (volute) housing. The blower The heater matrix, located in the distribution unit, is motor can be used to boost the air flow into the connected to the engine cooling system. As coolant is distribution unit. The air flap controls the supply of circulated continuously through the matrix, a selection heated or ambient air from the heater unit into a of heated or ambient air is controlled by two flaps plenum chamber integeral with the vehicle fascia. Two within the distribution unit.The temperature flap flaps in the plenum chamber (heater duct) distribute controls the amount of ambient air to the heater the air flow to either the footwell vents or windscreen matrix, air being supplied demister vents.
- Non air conditioning fascia shown
- 3. Blower motor fan speed control
- Heater controls
Move the lever progressively downwards to increase 1. Temperature control fan speed. With the control at ’O’ the fan is switched off and the volume of air entering the passenger Move the lever downwards to increase air compartment is solely dependent on ram effect when temperature or up to decrease air temperature. the vehicle is moving forward.
2. Air distribution control
Lever fully up - windscreen vents only. Lever midway - footwell and windscreen vents. Lever fully down - footwell vents.
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