2018 Jeep Grand Cherokee AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Jeep Grand Cherokee 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 Jeep Grand Cherokee 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 Jeep Grand Cherokee?

To effectively diagnose an AC issue in a 2018 Jeep Grand Cherokee, start by visually inspecting the air conditioning system for any signs of damage or leaks, such as oil stains or wet spots beneath the vehicle. This initial check can often reveal obvious problems that are easy to address. Next, ensure that the AC compressor is engaging properly when the system is activated; a malfunctioning compressor can lead to inadequate cooling. It's also crucial to verify that the AC system is adequately charged with refrigerant, which can be done using a pressure gauge to assess the pressure levels. Additionally, test the AC controls inside the vehicle to confirm they are functioning correctly, allowing you to adjust the temperature and fan speed as needed. Finally, listen for any unusual noises when the AC is running, as these sounds may indicate issues with the compressor or other components. By following these steps, you can systematically diagnose the AC problem and take the necessary actions to restore comfort in your Jeep.

What are the common problems that could cause the AC to stop working in a 2018 Jeep Grand Cherokee?

When troubleshooting the AC system in a 2018 Jeep Grand Cherokee, it's essential to understand the common problems that could lead to a malfunction. One of the primary issues is low refrigerant levels, which can significantly hinder the system's ability to cool the air effectively. If the refrigerant is low, it may indicate a leak that needs to be addressed. Another frequent culprit is a faulty compressor; if the compressor is not functioning correctly, it will fail to circulate refrigerant, resulting in warm air blowing from the vents. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the AC's operation, making it crucial to inspect these components. A clogged or leaking condenser can also impede the cooling process, as it prevents the system from dissipating heat properly. Lastly, broken cooling fans can lead to insufficient airflow, further diminishing the AC's performance. By identifying and addressing these common problems, you can effectively diagnose and potentially resolve the AC issues in your Jeep Grand Cherokee.

How urgent is it to repair the non-functioning AC in a 2018 Jeep Grand Cherokee?

When faced with a non-functioning AC in your 2018 Jeep Grand Cherokee, the urgency of repair cannot be overstated. A malfunctioning AC system directly impacts your comfort, especially during sweltering summer months or on long road trips, where the heat can make driving not only uncomfortable but also hazardous. Moreover, the safety aspect is critical; high temperatures can lead to heat-related illnesses, which may impair your concentration and reaction times, increasing the risk of accidents. Additionally, neglecting AC issues can lead to more severe problems within the vehicle's cooling system, potentially resulting in costly repairs down the line. Lastly, maintaining a fully operational AC system is essential for preserving your vehicle's resale value, as prospective buyers are likely to be deterred by a car with a faulty air conditioning system. Therefore, addressing AC repairs promptly is advisable to ensure a safe, comfortable, and valuable driving experience.

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