Kia Niro: Heating, Ventilation and 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 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
Suspected 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 level
2. Heater control assembly
No compressor operation
1. Refrigerant level
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
Ventilated air not cold
1. Refrigerant level
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 level
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

Specifications
Specification Air Conditioner Item Specification Compressor Type HES27 (Electric Scroll) Communicatio ...

Air Conditioning System
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Other information:

Kia Niro 2017 (DE HEV) Service Manual: Specifications
Specification Item Specification Input Voltage (V) 204 - 275.2 Operating Frequency (Hz) Max. 826 Output Voltage (V) [Auxiliary 12V Battery] 12.8 - 15.1 LD ...

Kia Niro (DE HEV) Owners Manual: HEV (Hybrid electric vehicle) system
The Kia Hybrid Electric Vehicle (HEV) uses both the gasoline engine and the electric motor for power. The electric motor is run by a 240V high-voltage HEV battery. Depending on the driving conditions, the HEV computer selectively operates between the engine and the electric motor or even both a ...

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