Subaru Legacy 2004 Service Manual page 3410

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
28.General Diagnostic Table
A: INSPECTION
Blower motor
Compressor
Cold air not emitted.
Warm air not emitted.
Temperature of air from vents does not change.
Unable to switch blow vents.
Unable to switch suction vents.
General Diagnostic Table
Symptom
Doesn't operate.
Noise
Doesn't operate.
Noise
Fuse
Blower motor relay
Blower motor
Blower motor resistor
Blower switch
Wire harness
Blower motor
Refrigerant
Fuse
Air conditioning relay
Magnet clutch
Compressor
Pressure switch
A/C switch
Blower switch
Wire harness
V-Belt
Magnet clutch
Compressor
Refrigerant
V-Belt
Magnet clutch
Compressor
Pressure switch
A/C switch
Blower switch
Wire harness
Heater duct
Heater vent duct
Engine coolant
Blower switch
Heater core
Heater cock solenoid valve
Engine coolant
Air mix actuator (Auto A/C)
Wire harness (Auto A/C)
Temperature control cable (Manual A/C)
Mode actuator (Auto A/C)
Air flow switch (Auto A/C)
Wire harness (Auto A/C)
Mode cable (Manual A/C)
Air inlet select switch (Auto A/C)
FRESH/RECIRC actuator (Auto A/C)
Wire harness (Auto A/C)
Intake cable (Manual A/C)
AC-48
Repair order