Workshop Manuals Factory service & repair Land Rover
01 Introduction02 General specification data03 Engine tuning data04 General fitting reminders05 Lubricants, fluids and capacities06 Maintenance07 Engine08 Emission control09 Fuel system10 Cooling system11 Manifold and exhaust system12 Transfer gearbox13 Automatic gearbox14 Propeller shafts15 Rear axle and final drive16 Front axle and final drive17 Steering18 Front suspension19 Rear suspension20 Brakes21 Wheels and tyres22 Chassis and body23 Heating and ventilation24 Air conditioning25 Wipers and washers26 Electrical27 Instruments
Land Rover Defender 90 Workshop Manual (NAS)23 · Heating and ventilation
23 · Heating & A/C

2. Air distribution control (Heating and ventilation)

Make
Land Rover
Model
Defender 90 Workshop Manual (NAS)
Section
Description and operation › 2. Air distribution control
Heating and ventilation2. 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.

HEATER OPERATION through a ducted vent on top of the vehicle front wing to the blower moto
  • 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.

Parts & tools for this job For Land Rover Defender

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.