Discovery II
AIR CONDITIONING
82-10
DESCRIPTION AND OPERATION
Temperature and distribution control
Figure shows flaps set for medium heat to face level and footwell outlets
1 Windscreen/Side windows outlet
2 Heater assembly casing
3 Air inlet
4 Evaporator
5 Heater matrix
6 Front footwells outlet
7 Rear footwells outlet
8 Face level outlet
Control system
The control system operates the refrigerant system and the control flaps in the heater assembly to control the
temperature and distribution of air in the vehicle interior. It also outputs signals to the fresh/recirculated air servo motor
and the blower to control the volume and source of inlet air. The control system consists of:
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An Air Temperature Control (ATC) ECU.
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A dual pressure switch.
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An evaporator temperature sensor.
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An in-car temperature sensor.
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A sunlight sensor.
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A heater coolant temperature sensor.
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An ambient temperature sensor.