2018 Genesis G90 AC Isn't Working

Common Causes of AC Issues in Your 2018 Genesis G90 and How to Restore Comfort in Your Vehicle

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Reviewed by
Aisha
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 Genesis G90 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 steps to diagnose the AC issue in a 2018 Genesis G90?

When diagnosing an AC issue in a 2018 Genesis G90, start by checking the airflow from the vents; weak or warm air can indicate a malfunction. Next, listen for any unusual noises when the AC is activated, as these sounds may suggest problems with the compressor or other components. It's also crucial to inspect the system for visible refrigerant leaks, which can significantly impact cooling efficiency. To further assess the situation, use a thermometer to measure the air temperature coming from the vents, ensuring it aligns with expected cooling levels. Lastly, verify that the AC controls are functioning correctly and that the settings are appropriately adjusted for cooling. By systematically following these steps, you can effectively diagnose the AC issue and determine the best course of action for repairs.

What are the common problems that could cause the AC to stop working in a 2018 Genesis G90?

When the air conditioning system in a 2018 Genesis G90 fails to operate effectively, several common problems may be at play. One of the primary culprits is low refrigerant levels, which can significantly hinder the system's ability to cool the air. If the refrigerant is low, it may indicate a leak that needs to be addressed. Another frequent issue is a faulty compressor; if the compressor is not functioning correctly, it can prevent the system from circulating refrigerant, leading to inadequate cooling. Additionally, electrical problems such as blown fuses, malfunctioning relays, or damaged wiring can disrupt the AC's operation, making it essential to check these components. A clogged or leaking condenser can also impede the system's performance, as it plays a crucial role in dissipating heat. Lastly, a defective thermostat may fail to regulate the temperature properly, further complicating the cooling process. For those looking to tackle these issues themselves, understanding these common problems can help in diagnosing and potentially resolving the AC malfunction in their Genesis G90. However, if the problem persists, consulting a professional mechanic is advisable to ensure a thorough and effective repair.

How urgent is it to address the AC failure in my 2018 Genesis G90?

Addressing an AC failure in your 2018 Genesis G90 is crucial for several reasons. First and foremost, a functioning air conditioning system is vital for maintaining a comfortable driving experience, particularly during hot weather or long trips. Without it, you may find yourself enduring uncomfortable conditions that can detract from your enjoyment of the vehicle. Moreover, safety is a significant concern; a malfunctioning AC can lead to fogging or condensation on the windshield, impairing visibility and increasing the risk of accidents. Additionally, delaying repairs can result in more severe damage to the AC system, leading to higher repair costs in the future. By addressing the issue promptly, you not only safeguard your comfort and safety but also help maintain the overall condition of your vehicle, which is essential for preserving its resale value. In summary, while the urgency may vary based on specific symptoms, it is generally advisable to act quickly to ensure a safe and pleasant driving experience.

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2018 Genesis G90 AC Troubleshooting Guide | RepairPal