Kia Optima Hybrid: Heating,Ventilation, Air Conditioning / Troubleshooting

Troubleshooting
Problem Symptoms Table
Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor.
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
Standard:
Symptom
Suspect Area
No blower operation
1)
Blower fuse
2)
Blower motor
3)
PWM Blower Module
4)
Blower speed control switch
5)
Wire harness
No air temperature control
1)
Engine coolant capacity
2)
Heater control assembly
No compressor operation
1)
Refrigerant capacity
2)
A/C Fuse
3)
Compressor
4)
A/C pressure transducer
5)
A/C switch
6)
Evaporator temperature sensor
7)
Wire harness
8)
Cooling fan
9)
HEV system
A/C does not blow cold air
1)
Refrigerant capacity
2)
Refrigerant pressure
3)
Compressor
4)
A/C pressure transducer
5)
Evaporator temperature sensor.
6)
A/C switch.
7)
Heater control assembly
8)
Wire harness
Insufficient cooling
1)
Refrigerant capacity
2)
Compressor.
3)
Condenser.
4)
Expansion valve.
5)
Evaporator.
6)
Refrigerant lines
7)
A/C pressure transducer
8)
Heater control assembly
No air inlet control
1)
Heater control assembly
No mode control
1)
Heater control assembly
2)
Mode actuator
No cooling fan operation
1)
Cooling fan fuse
2)
Fan motor
3)
Engine ECM
4)
Wire harness

Special Service Tools

Personal Protective Equipment NameIllustrationDescriptionInsulation gloveUsed when inspecting or working on the high voltage components[Insulation performance : 1000V / 300A or above]Insulation shoesUsed ...

Air Conditioning System

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