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Why does my Kia Sorento Third Generation (2015-2020) AC blow hot air? - Kia Sorento
Home/Cars/Kia/Sorento/Third Generation (2015-2020)/Why does my Kia Sorento Third Generation (2015-2020) AC blow hot air?

Why does my Kia Sorento Third Generation (2015-2020) AC blow hot air?

Kia Sorento Third Generation (2015-2020)

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ProblemSolution
ProblemSolution
3 min read
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Problem Statement

## Diagnosing Hot Air from the A/C in a 2015-2020 Kia Sorento

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Additional Information

Difficulty
medium
Severity
medium

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Diagnosing Hot Air from the A/C in a 2015-2020 Kia Sorento
Symptoms
  • A/C system blows hot air instead of cold.
  • A/C compressor not engaging or making unusual noises.
  • Visible signs of refrigerant leakage (oil spots or dye).
  • A/C control panel lights functioning but no cooling effect.
Diagnostic Steps

  1. Visual Inspection

    • Check for any obvious signs of damage or leaks in the A/C system, including the compressor, hoses, and evaporator.
    • Look for refrigerant oil stains, indicating a leak.
    • Inspect the cabin air filter and ensure it is not clogged.

  2. Check A/C Controls

    • Ensure that the A/C is set to the correct settings (e.g., temperature, mode).
    • Verify that the A/C switch illuminates when activated.
    • Test the climate control module by cycling through all settings.

  3. Verify A/C Compressor Engagement

    • With the engine running and A/C on, observe the A/C compressor.
    • The center hub of the compressor should engage; if it does not, this could indicate a problem with the compressor, electrical system, or refrigerant levels.

  4. Refrigerant Level Check

    • Connect a manifold gauge set to the low and high-pressure service ports.
    • A low reading on the low-pressure gauge (below 30 psi) can indicate low refrigerant levels, while a high-pressure reading (above 250 psi) may suggest overcharging or a blockage.

  5. Temperature Check

    • Use a digital thermometer to measure the outlet temperature of the A/C vents.
    • If the temperature is significantly higher than the ambient temperature, there may be an issue with the refrigerant or the compressor.

  6. Electrical Checks

    • Inspect fuses related to the A/C system in the fuse box.
    • Check for power at the A/C compressor clutch connector using a multimeter.
    • Test the A/C relay by swapping it with a similar relay in the fuse box.
Tools Required
  • Manifold gauge set
  • Digital thermometer
  • Multimeter
  • Basic hand tools (screwdrivers, wrenches)
  • Flashlight
  • Safety goggles and gloves
Repair Instructions

1. If Low on Refrigerant

  • Locate Refrigerant Leak: Use a UV dye and black light to find leaks.
  • Repair Leaks: Replace faulty components (hoses, seals, or compressor).
  • Recharge A/C System: Use a refrigerant recovery machine to evacuate and recharge the system with the correct type and amount of refrigerant.

2. If A/C Compressor Fails

  • Replace the A/C Compressor:
    • Disconnect the battery.
    • Remove belts and disconnect electrical connectors.
    • Remove the compressor from its mounting brackets and disconnect the refrigerant lines.
    • Install the new compressor and reconnect all components.
    • Recharge the system.

3. If Electrical Issues are Detected

  • Replace Fuses/Relays: If any fuses or relays are faulty, replace them as needed.
  • Repair Wiring: Inspect and repair any damaged wiring leading to the A/C compressor or control panel.

4. If Clogged Cabin Air Filter

  • Replace Cabin Air Filter:
    • Open the glove box and remove it to access the filter compartment.
    • Remove the old filter and install the new one, ensuring it is properly seated.

5. Test the System

  • After completing repairs, reconnect the battery.
  • Start the engine and turn on the A/C to verify the system is blowing cold air.
  • Monitor the system for any unusual noises or issues.
Conclusion

If you have followed the above steps and the issue persists, it may be necessary to consult a professional technician for further diagnostics and repair. The A/C system is complex, and specialized tools may be required for certain repairs.