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 (DE HEV) Owners Manual: Use high quality ethylene glycol coolant
Your vehicle is delivered with high quality ethylene glycol coolant in the cooling system. It is the only type of coolant that should be used because it helps prevent corrosion in the cooling system, lubricates the water pump and prevents freezing. Be sure to replace or replenish your coolant ...

Kia Niro 2017 (DE HEV) Service Manual: Brake/Clutch Fluid Repair procedures
Inspection Check the brake fluid level in the brake fluid reservoir. The level should be between “MIN” and “MAX” marks on the side of the reservoir. Use only hydraulic brake fluid conforming to DOT 3 or DOT 4 specification. Check the brake system for any leakage if th ...

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