Subaru 2009 IMPREZA Service Manual page 2728

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
28.General Diagnostic Table
A: INSPECTION
Blower motor
Compressor
Cold air not emitted.
Warm air not emitted.
General Diagnostic Table
Symptom
Does not operate.
Noise
Does not operate.
Noise
Fuse
Blower motor relay
Blower motor
Blower motor resistor (Manual A/C)
Blower switch
Wiring harness
Blower motor
Refrigerant
Fuse
Air conditioning relay
Magnet clutch
Compressor
Pressure switch
A/C switch
Blower switch
Wiring harness
V-belt
Magnet clutch
Compressor
Refrigerant
V-belt
Magnet clutch
Compressor
Pressure switch
Aspirator hose
Blower fan relay
Blower motor
A/C switch
Blower switch
Control module
Expansion valve
Evaporator
Air mix actuator (Auto A/C)
Temperature control cable (Manual A/C)
Wiring harness
Heater duct
Heater vent duct
Engine coolant
Aspirator hose
Air mix actuator (Auto A/C)
Temperature control cable (Manual A/C)
Blower switch
Heater core
AC-48
Repair order