Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 594
AC-35
Condenser
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
C: INSPECTION
1) Check to see that the condenser fins are not
clogged with debris or insects. Blow with com-
pressed air or flush fins with water as needed.
2) If any oil leak is found from the condenser, re-
place the condenser with a new part.
AC-36
Heater and Cooling Unit
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
17.Heater and Cooling Unit
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant. <Ref. to AC-19, PROCEDURE,
Refrigerant Recovery Procedure.>
3) Drain coolant from the radiator.
• Except for STI model: <Ref. to CO(w/o STI)-13,
DRAINING OF ENGINE COOLANT, REPLACE-
• STI model: <Ref. to CO(STI)-13, DRAINING OF
ENGINE COOLANT, REPLACEMENT, Engine
4) Remove the bolts securing expansion valve and
pipe in engine compartment. Release the heater
hose clamps in engine compartment to remove the
hoses.
CAUTION:
Seal the disconnected hose, pipe and engaging
part of expansion valve with a plug or vinyl tape
to prevent foreign matter from entering.
5) Remove the instrument panel. <Ref. to EI-55,
REMOVAL, Instrument Panel Assembly.>
6) Remove the blower motor unit assembly. <Ref.
to AC-25, REMOVAL, Blower Motor Unit Assem-
7) Disconnect the harness connectors of the actu-
ator, thermo sensor and power transistor or blower
resistor.
8) Remove the bolt and nuts and remove the heat-
er and cooling unit.
B: INSTALLATION
1) Install each part in the reverse order of removal.
2) Fill engine coolant.
• Other than STI model: <Ref. to CO(w/o STI)-13,
FILLING OF ENGINE COOLANT, REPLACE-
• STI model: <Ref. to CO(STI)-13, FILLING OF
ENGINE COOLANT, REPLACEMENT, Engine
3) Charge refrigerant. <Ref. to AC-20, PROCE-
DURE, Refrigerant Charging Procedure.>
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”.
• Heater cooling unit: <Ref. to AC-4, HEATER
COOLING UNIT, COMPONENT, General De-
• Blower motor unit: <Ref. to AC-6, BLOWER
MOTOR UNIT, COMPONENT, General De-
AC-00921
AC-01596
AC-37
Evaporator
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
18.Evaporator
A: REMOVAL
1) Disconnect the ground cable from battery.
3) Remove the bolt and detach the pipe from the expansion valve.
CAUTION:
Seal the disconnected hose, pipe and engaging part of expansion valve with a plug or vinyl tape to
prevent foreign matter from entering.
4) Remove the instrument panel lower. <Ref. to EI-54, INSTRUMENT PANEL LOWER, REMOVAL, Center
5) Remove the blower motor unit. <Ref. to AC-25, REMOVAL, Blower Motor Unit Assembly.>
6) Remove the screw and remove the evaporator pipe cover.
7) Remove the evaporator pipe mounting bolt, and evaporator cover mounting screw and clip.
AC-02116
AC-02110
AC-02364
AC-38
Evaporator
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
8) Remove the evaporator cover and evaporator pipe.
CAUTION:
Since the evaporator cover and the evaporator pipe cannot be removed by itself, remove them as a
unit.
(1) Disengage the evaporator and the pipe.
(2) Remove the evaporator pipe with the evaporator cover.
9) Remove the evaporator.
10) Remove the evaporator sensor from the evaporator.
AC-02365
AC-02113
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