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:

Symptom:

No blower operation

Suspected Area:

  1. Blower fuse
  2. Blower motor
  3. PWM blower module
  4. Blower speed control switch
  5. Wire harness

Symptom:

No air temperature control

Suspected Area:

  1. Engine coolant level
  2. Heater control assembly

Symptom:

No compressor operation

Suspected Area:

  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

Symptom:

Ventilated air not cold

Suspected Area:

  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

Symptom:

Insufficient cooling

Suspected Area:

  1. Refrigerant level
  2. Compressor
  3. Condenser
  4. Expansion valve
  5. Evaporator
  6. Refrigerant lines
  7. A/C pressure transducer
  8. Heater control assembly

Symptom:

No air inlet control

Suspected Area:

  1. Heater control assembly

Symptom:

No mode control

Suspected Area:

  1. Heater control assembly
  2. Mode actuator

Symptom:

No cooling fan operation

Suspected Area:

  1. Cooling fan fuse
  2. Fan motor
  3. Engine ECM
  4. Wire harness

Specification

Air Conditioner

Blower Unit

Blower Unit

Heater and Evaporator Unit

Heater and Evaporator Unit

Tightening Torques

Tightening Torques

Air Conditioning System

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