Subaru LEGACY 2002 Quick Reference Index page 484

AIR CONDITIONING CYCLE
HVAC System (Heater, Ventilator and A/C)
8. Air Conditioning Cycle
A: GENERAL
The refrigerant recirculates in the air conditioning system, flowing out of the compressor, passing
through the condenser, receiver drier and evaporator, and returning to the compressor.
The flow of refrigerant to the evaporator is controlled by an expansion valve located inside the
evaporator.
The compressor operates and stops repeatedly to maintain the evaporator temperature within a
specified range. When the evaporator temperature falls below the specified temperature, the ther-
mo-control amplifier stops the compressor operation. When the evaporator temperature rises
above the specified temperature, the thermo-control amplifier puts back the compressor into op-
eration.
The refrigerant system is protected against excessively high or low pressures by a pressure
switch. If the system pressure rises or drops excessively, the pressure switch is activated to pre-
vent the compressor from operating.
LHD model
S4H0003B
AC-12