| Condition | Possible Cause | Action |
|---|---|---|
|
Cool air does not come out (A/C system normal operates)
|
Insufficient or excessive charge of refrigerant
|
Check charge of refrigerant and system for leaks.
|
|
Condenser clogged
|
Check condenser.
|
|
|
A/C evaporator clogged or frosted
|
Check A/C evaporator and A/C evaporator thermistor.
|
|
|
A/C evaporator temperature sensor faulty
|
Check A/C evaporator temperature sensor.
|
|
|
Expansion valve faulty
|
Check expansion valve.
|
|
|
Receiver/dryer clogged
|
Check receiver/dryer.
|
|
|
Compressor drive belt loosen or broken
|
Adjust or replace drive belt.
|
|
|
Magnetic clutch faulty
|
Check magnetic clutch.
|
|
|
Compressor faulty
|
Check compressor.
|
|
|
Air in A/C system
|
Replace receiver/dryer, and perform evacuation and charging.
|
|
|
Air leaking from cooling unit or air duct
|
Repair as necessary.
|
|
|
Heater and ventilation system faulty
|
Check air inlet box (cooling unit), heater control lever assembly and heater unit.
|
|
|
Heater blower motor faulty
|
Check heater blower motor referring to
Heater Blower Motor Inspection
.
|
|
|
Excessive compressor oil existing in A/C system
|
Pull out compressor oil in A/C system circuit, and replace compressor.
|