Kia Sorento: Troubleshooting

Troubleshooting

Before repairing the air conditioning components, check the refrigerant, compressor oil, air filter.

No blower operation

Suspected causes	Repair
Faulty connection of connector	Check the connector
Heater fuse	Repair or replace
Blower relay	Repair or replace
Blower Motor	Repair or replace
Wiring break and short circuit	Repair or replace

No air temperature control

Suspected causes	Repair
Coolant amount	Repair or supplement
Faulty connection of connector	Check the connector
Temperature control actuator	Repair or replace
Auto Temperature Control Unit	Repair or replace

No compressor operation

Suspected causes	Repair
Refrigerant amount	Refrigerant charging / vacuum / leak test
A/C fuse	Repair or replace
Compressor	Repair or replace
A/C pressure transducer	Repair or replace
A/C switch	Repair or replace
Evaporator temperature sensor	Repair or replace
Wiring break and short circuit	Repair or replace

Not blowing cold air

Suspected causes	Repair
Refrigerant amount	Refrigerant charging / vacuum / leak test
Refrigerant pressure	Refrigerant charging / vacuum / leak test
Compressor	Repair or replace
A/C pressure transducer	Repair or replace
Evaporator temperature sensor	Repair or replace
A/C switch	Repair or replace
Auto Temperature Control Unit	Repair or replace
Wiring break and short circuit	Repair or replace

Insufficient cooling

Suspected causes	Repair
Refrigerant amount	Refrigerant charging / vacuum / leak test
Compressor	Repair or replace
Condenser	Repair or replace
Expansion valve	Repair or replace
Evaporator	Repair or replace
Refrigerant Line	Repair or replace
A/C pressure transducer	Repair or replace
Auto Temperature Control Unit	Repair or replace

Poor air inlet control

Suspected causes	Repair
Faulty connection of connector	Check the connector
Auto Temperature Control Unit	Repair or replace
Intake Actuator	Repair or replace
Wiring break and short circuit	Repair or replace

No mode control

Suspected causes	Repair
Faulty connection of connector	Check the connector
Auto Temperature Control Unit	Repair or replace
Mode Control Actuator	Repair or replace
Wiring break and short circuit	Repair or replace

No cooling fan operation

Suspected causes	Repair
Faulty connection of connector	Check the connector
Cooling fan fuse	Repair or replace
Fan motor	Repair or replace
ECU	Repair or replace
Wiring break and short circuit	Repair or replace

Tightening Torque Rear A/C Rear A/C unit Item N·m kgf·m lb·ft lb·in ...

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