2018 Kia Sorento AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Kia Sorento and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 2018 Kia Sorento AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take when the AC isn't working in a 2018 Kia Sorento?

When your 2018 Kia Sorento's AC isn't functioning properly, start by checking the thermostat settings to confirm they are set to a cool temperature, as incorrect settings can often be the simplest explanation for the problem. Next, inspect the air filters; if they are dirty or clogged, replacing them can significantly improve airflow and AC performance. It's also crucial to examine the refrigerant levels, as low levels can lead to warm air blowing from the vents. If you suspect low refrigerant, using a pressure gauge can help you assess the situation, or you may want to consult a professional. Additionally, look for any visible signs of leaks in the AC system, such as oily residue around hoses or connections, which can indicate a refrigerant loss. Pay attention to the AC compressor as well; listen for any unusual noises when the AC is activated, as this could signal a malfunction. Finally, ensure that all electrical components related to the AC system are secure and functioning properly, as faulty connections can hinder performance. By systematically addressing these areas, you can effectively diagnose and potentially resolve the AC issues in your Kia Sorento before seeking professional assistance.

What are the common problems that could cause the AC to stop working in a 2018 Kia Sorento?

When your 2018 Kia Sorento's air conditioning system fails, understanding the common problems can empower you to diagnose the issue before seeking professional help. One prevalent culprit is refrigerant leaks, which can significantly reduce the cooling efficiency, leaving you with warm air blowing from the vents. Another potential issue is a faulty compressor; if this component isn't functioning correctly, it can disrupt the entire cooling process. Additionally, electrical problems, such as blown fuses or damaged wiring, can prevent the AC system from operating as intended. Clogged or blocked condensers can also hinder refrigerant flow, while a malfunctioning thermostat may lead to inconsistent temperature regulation. Lastly, if you're experiencing weak airflow, the blower motor could be at fault. By familiarizing yourself with these common issues, you can take the first steps toward troubleshooting your AC system effectively, ensuring a more comfortable driving experience.

How urgent is it to address the non-functioning AC in a 2018 Kia Sorento?

When your 2018 Kia Sorento's air conditioning system fails, it’s crucial to recognize the urgency of the situation. Driving without a functioning AC in hot weather can lead to severe discomfort and health risks, particularly for vulnerable passengers such as children or the elderly. Moreover, a malfunctioning AC may signal deeper issues within the vehicle's cooling system, which, if ignored, could result in overheating and significant engine damage. Additionally, if the AC failure is due to a refrigerant leak, it poses not only a risk to your vehicle's performance but also environmental hazards. Delaying repairs can escalate minor issues into costly repairs, making it essential to address the problem promptly. While it may not seem like an immediate emergency, prioritizing the repair of your AC system will ensure a safer and more comfortable driving experience.

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