KIA Niro: Heating, Ventilation And Air Conditioning / 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 find the cause of the problem. The numbers indicate the priority of the likely causes of the problem. Check each part in order. If necessary, replace the relevant parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
Standard:
Symptom:
No blower operation
Suspected Area:
- Blower fuse
- Blower motor
- PWM blower module
- Blower speed control switch
- Wire harness
Symptom:
No air temperature control
Suspected Area:
- Engine coolant level
- Heater control assembly
Symptom:
No compressor operation
Suspected Area:
- Refrigerant level
- A/C fuse
- Compressor
- A/C pressure transducer
- A/C switch
- Evaporator temperature sensor
- Wire harness
- Cooling fan
- HEV system
Symptom:
Ventilated air not cold
Suspected Area:
- Refrigerant level
- Refrigerant pressure
- Compressor
- A/C pressure transducer
- Evaporator temperature sensor
- A/C switch
- Heater control assembly
- Wire harness
Symptom:
Insufficient cooling
Suspected Area:
- Refrigerant level
- Compressor
- Condenser
- Expansion valve
- Evaporator
- Refrigerant lines
- A/C pressure transducer
- Heater control assembly
Symptom:
No air inlet control
Suspected Area:
- Heater control assembly
Symptom:
No mode control
Suspected Area:
- Heater control assembly
- Mode actuator
Symptom:
No cooling fan operation
Suspected Area:
- Cooling fan fuse
- Fan motor
- Engine ECM
- Wire harness
Specification
Air Conditioner
Blower Unit
Heater and Evaporator Unit
Tightening Torques
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