Suzuki SX4 Service Manual page 1041

Condition
Cool air does not come
out or insufficient cooling
(A/C compressor normal
operation)
Cool air does not come
out only intermittently
Cool air comes out only at
high speed
Possible cause
Insufficient or excessive charge of
refrigerant
Condenser clogged
A/C evaporator clogged or frosted
Evaporator temperature sensor faulty
Expansion valve faulty
Desiccant clogged
Compressor drive belt loosened or
broken
Magnet clutch faulty
Compressor faulty
Air in A/C system
Air leaking from HVAC unit or air duct
Heater and ventilation system faulty
HVAC control module faulty
Temperature control actuator faulty
Blower motor faulty
Excessive compressor oil in A/C system Drain excessive compressor oil from A/C
Wiring connection faulty
Expansion valve faulty
Excessive moisture in A/C system
Magnet clutch faulty
Excessive amount of refrigerant
Condenser clogged
Insufficient charge of refrigerant
Air in A/C system
Compressor drive belt loosened or
broken
Compressor faulty
Air Conditioning System: Automatic Type 7B-47
Correction / Reference Item
Check the amount of refrigerant and system
for leaks.
Check condenser referring to "Condenser
Assembly On-Vehicle Inspection: Manual
Type".
Check A/C evaporator and evaporator
temperature sensor referring to "Evaporator
Inspection: Manual Type" and "Evaporator
Temperature Sensor Inspection: Manual Type".
Check evaporator temperature sensor
referring to "Evaporator Temperature Sensor
Inspection: Manual Type".
Check expansion valve referring to "Expansion
Valve Inspection: Manual Type".
Check desiccant and cap with filter.
Adjust or replace drive belt.
Check magnet clutch referring to "Magnet
Clutch Inspection: Manual Type".
Check compressor.
Replace condenser, and then perform
evacuation and charge referring to "Operation
Procedure for Refrigerant Charge: Manual
Type".
Repair as necessary.
Check HVAC unit.
Check HVAC control module referring to
"Inspection of HVAC Control Module and Its
Circuit: Automatic Type".
Check temperature control actuator referring to
"Temperature Control Actuator and Its Circuit
Inspection: Automatic Type".
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
system circuit and compressor.
Repair as necessary.
Check expansion valve referring to "Expansion
Valve Inspection: Manual Type".
Replace condenser, and then perform
evacuation and charge referring to "Operation
Procedure for Refrigerant Charge: Manual
Type".
Check magnet clutch referring to "Magnet
Clutch Inspection: Manual Type".
Check the amount of refrigerant.
Check condenser referring to "Condenser
Assembly On-Vehicle Inspection: Manual
Type".
Check the amount of refrigerant and system
for leaks.
Replace condenser, and then perform
evacuation and charge referring to "Operation
Procedure for Refrigerant Charge: Manual
Type".
Adjust or replace drive belt.
Check compressor.