2020 Ram 1500 A/C Refrigerant & Oil Capacity

Quick answer

• Refrigerant Type: R-1234yf
• Full System Charge: 17.6 oz (500 grams)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 4.7 fl oz (140 mL)
• Low-Side Service Port: On the accumulator, near the firewall on the passenger side.
• High-Side Service Port: On the A/C line, typically near the condenser on the passenger side, closer to the front of the vehicle.

Why R-1234yf matters

The 2020 Ram 1500 utilizes R-1234yf refrigerant, a standard for most new vehicles since 2014. This transition from the older R-134a was driven by environmental concerns, as R-1234yf has a significantly lower Global Warming Potential (GWP). While eco-friendly, it comes with a few considerations:

• Cost: R-1234yf is considerably more expensive than R-134a, making A/C system repairs or recharges potentially pricier.
• EPA Regulations: Due to its environmental impact, the handling of R-1234yf is strictly regulated by the EPA. Proper recovery and recycling are crucial to minimize its release into the atmosphere.
• Specialized Equipment: Servicing an R-1234yf system requires specialized recovery and recharge equipment. These machines are designed to prevent cross-contamination with R-134a and ensure accurate charging by weight. Standard R-134a equipment cannot be used.

Recharge procedure

Recharging an A/C system, especially one using R-1234yf, is not as simple as just adding refrigerant. Here's a high-level overview, emphasizing critical steps:

1. Diagnosis: Before adding any refrigerant, a thorough diagnosis is essential to identify the root cause of any A/C performance issues. Low refrigerant often indicates a leak.
2. Recovery: Any existing refrigerant must be safely recovered from the system using an EPA-certified R-1234yf recovery machine. Do not vent refrigerant into the atmosphere.
3. Evacuation: After recovery, the system must be evacuated using a vacuum pump. This process removes air and moisture, which can cause significant damage to the A/C system components and reduce cooling efficiency.
4. Leak Testing: After evacuation, the system should be leak tested to ensure there are no breaches. Even a small leak will lead to refrigerant loss over time.
5. Proper Charge by Weight: The most critical step is to charge the system with the exact amount of refrigerant specified by the manufacturer (17.6 oz or 500 grams for your 2020 Ram 1500). Never attempt to charge by pressure alone. Overcharging or undercharging can lead to poor performance, compressor damage, and other expensive repairs. An R-1234yf-compatible manifold gauge set can help monitor pressures during the process, but the final charge must be by weight.
6. PAG Oil Replacement (if applicable): If components were replaced, or the system was significantly opened, the appropriate amount and type of PAG 46 oil (4.7 fl oz or 140 mL) must be added. Refer to the specific service procedures for component replacement, as different components hold varying amounts of oil.

Common A/C problems for this vehicle

While the 2020 Ram 1500 is a robust truck, certain common A/C issues can arise:

• Compressor Failures: The A/C compressor is the heart of the system. Failures can occur due to lack of lubrication (from low refrigerant or incorrect oil), internal wear, or electrical issues. Symptoms include a loud compressor, lack of cold air, or a seized clutch.
• Condenser Issues: The condenser, located at the front of the vehicle, can be susceptible to damage from road debris. A clogged or damaged condenser can restrict airflow and reduce cooling efficiency. Leaks can also occur in this component.
• Evaporator Leaks: The evaporator is located inside the vehicle's dashboard. Leaks here can be difficult and costly to repair due to the labor involved in accessing the component. A common sign is refrigerant odor in the cabin or constantly needing to add refrigerant with no external leaks found.
• Blend Door Actuator Problems: While not a refrigerant issue, blend door actuators control the airflow and temperature distribution within the cabin. A faulty actuator can lead to insufficient cooling on one side of the vehicle or air only blowing through certain vents.

When to call a pro

Given the complexity of modern automotive A/C systems, especially those using R-1234yf, it's almost always best to consult a professional A/C technician. They have the specialized tools, knowledge, and EPA 609 certification required to diagnose and repair your system safely and effectively. Attempting DIY repairs without the proper equipment can lead to further damage, personal injury, and illegal release of refrigerants.

Safety Disclaimer: Working with automotive air conditioning systems involves high pressures and specialized refrigerants. Improper handling can cause serious injury, including chemical burns and frostbite. Refrigerants are also harmful to the environment if released. Always wear appropriate personal protective equipment and follow all manufacturer and EPA guidelines. Only EPA 609 certified technicians should perform A/C system repairs involving refrigerants.

Find a certified A/C shop on Repairius.