2019 Ram 2500 AC Isn't Working

Common Causes of AC Malfunctions in Your 2019 Ram 2500 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 2019 Ram 2500 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 on a 2019 Ram 2500?

When your 2019 Ram 2500's AC isn't functioning properly, start by checking the thermostat settings to ensure they are correctly adjusted to a cool temperature, as this is a common oversight. Next, inspect the air filters; dirty or clogged filters can significantly hinder airflow, so replacing them can often restore performance. After that, examine the refrigerant levels using a pressure gauge; low levels can lead to inadequate cooling, and adding refrigerant may be necessary. It's also crucial to look for any visible leaks in the AC system, particularly around hose connections and the compressor, as these can lead to refrigerant loss. Additionally, verify that the AC compressor is engaging when the system is activated, since a malfunctioning compressor can prevent cold air from circulating. Don't forget to check the electrical connections related to the AC system for any loose or damaged wires, as faulty connections can disrupt functionality. Finally, using a diagnostic tool to scan for error codes can provide insights into specific issues affecting the AC system. By following these steps, you can effectively diagnose and potentially resolve the AC issues in your Ram 2500.

What are the common problems that could cause the AC to stop working in a 2019 Ram 2500?

When the air conditioning system in your 2019 Ram 2500 ceases to function, it can be frustrating, especially during hot weather. One of the most frequent culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, leading to inadequate cooling. Another common issue is a faulty compressor; if the compressor fails, it won't circulate refrigerant effectively, resulting in a warm cabin. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the AC's operation, so it's wise to check these components first. Additionally, a clogged or leaking condenser can hinder the system's ability to cool air, while a malfunctioning thermostat may fail to regulate the temperature properly. Lastly, if you're experiencing weak airflow from the vents, the blower motor could be at fault. While some of these issues can be diagnosed and potentially fixed at home, it's crucial to consult a qualified mechanic for a thorough inspection and repair to ensure your AC system operates efficiently.

How urgent is it to repair the non-functioning AC in a 2019 Ram 2500?

Addressing a non-functioning AC in your 2019 Ram 2500 should be treated with urgency due to the significant impact it can have on your driving experience and vehicle longevity. A malfunctioning AC system not only compromises your comfort during hot weather but can also distract you from the road, posing safety risks. Moreover, a vehicle with a poorly functioning AC may suffer in terms of resale value, as potential buyers often look for well-maintained features. Ignoring AC issues can lead to more severe problems, resulting in costly repairs down the line. Therefore, it is advisable to prioritize the repair of your AC system to ensure a safe, comfortable, and valuable driving experience.

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Why Your 2019 Ram 2500 AC Is Not Working: Causes & Solutions