2020 Ram 3500 AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 Ram 3500 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 2020 Ram 3500 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 2020 Ram 3500?

When faced with an AC malfunction in a 2020 Ram 3500, it's crucial to start with a systematic diagnostic approach. Begin by checking the thermostat settings to confirm they are correctly adjusted to a cool temperature, as incorrect settings can often be the simplest explanation for inadequate cooling. Next, inspect the air filters; dirty or clogged filters can significantly hinder airflow, so replacing them can enhance the AC's performance. It's also important to examine the refrigerant levels, as low levels can lead to system failure. Use a gauge to assess the refrigerant and replenish it if necessary. Additionally, look for any visible signs of leaks, such as oily residue, which can indicate refrigerant loss. Testing the compressor is another vital step; ensure it engages when the AC is activated, as a malfunctioning compressor may require repair or replacement. Lastly, check the electrical connections, including fuses and relays, to rule out any faulty wiring that could disrupt the AC's operation. If these initial steps do not resolve the issue, consulting a professional mechanic or HVAC technician is recommended for a thorough diagnosis and repair.

What are the common problems that could cause the AC to stop working in a 2020 Ram 3500?

When the air conditioning system in your 2020 Ram 3500 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, preventing the system from cooling effectively. Another frequent issue is a faulty compressor; if the compressor is not engaging or is damaged, it will fail to circulate refrigerant, leading to a lack of 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. Clogged or leaking condensers can also hinder the system's performance, as they are crucial for dissipating heat. Lastly, ensure that the cooling fans are operational; if they are broken or not spinning correctly, the AC system may struggle to maintain a cool temperature. By addressing these common issues, you can effectively troubleshoot and potentially resolve the AC problems in your Ram 3500.

How urgent is it to repair the non-functioning AC in a 2020 Ram 3500?

When faced with a non-functioning AC in your 2020 Ram 3500, addressing the issue promptly is crucial for several reasons. First and foremost, a reliable AC system is essential for maintaining comfort during hot weather, ensuring that both the driver and passengers can enjoy a pleasant driving experience. Beyond comfort, the safety implications cannot be overlooked; a malfunctioning AC can lead to driver fatigue, especially during long trips in extreme heat, which may compromise focus and increase the risk of accidents. Additionally, a well-functioning AC system plays a vital role in improving air quality by filtering out pollutants and allergens, contributing to the overall health of everyone in the vehicle. Lastly, neglecting AC repairs can adversely affect the resale value of your Ram 3500, as potential buyers often look for well-maintained features. Therefore, it is advisable to prioritize the repair of your AC system to ensure comfort, safety, health, and the long-term value of your vehicle.

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2020 Ram 3500 AC Not Working: Causes & Repair Costs