2015 Ram 1500 A/C Refrigerant & Oil Capacity Guide

Quick Answer

• Refrigerant Type: R-134a
• Full System Charge: 22 oz (624 grams)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 7.0 oz (207 mL)
• Low-Side Service Port Location: On the accumulator/drier, near the firewall on the passenger side.
• High-Side Service Port Location: On the A/C line, near the condenser at the front of the vehicle, typically on the passenger's side.

The 2015 Ram 1500 utilizes R-134a refrigerant. Many vehicles began transitioning to the newer R-1234yf refrigerant around 2014, but the Ram 1500 continued with R-134a for this model year. Always verify the correct refrigerant type by checking the A/C system label under the hood.

Why R-1234yf Matters (and why your 2015 Ram 1500 doesn't use it)

While your 2015 Ram 1500 uses R-134a, it's worth understanding why newer refrigerants like R-1234yf are becoming standard. R-1234yf was introduced to address environmental concerns, as it has a significantly lower Global Warming Potential (GWP) compared to R-134a. This transition was largely driven by EPA regulations and automotive industry efforts to reduce carbon footprints.

For vehicles that use R-1234yf, the cost of the refrigerant itself is higher, and specialized recovery and recycling equipment is required due to its mild flammability and specific handling procedures. This often translates to higher service costs for R-1234yf systems. However, as your 2015 Ram 1500 uses R-134a, these specific concerns regarding R-1234yf do not directly apply to your truck.

Recharge Procedure for Your 2015 Ram 1500

Recharging your A/C system correctly is crucial for its performance and longevity. Here's a high-level overview, but always refer to the factory service manual for detailed instructions.

1. Safety First: Ensure you wear appropriate personal protective equipment, including eye protection and gloves.
2. Evacuate the System: The A/C system should be evacuated using a vacuum pump to remove any air and moisture. This is a critical step that cannot be skipped, as moisture in the system can lead to component damage and poor cooling performance.
3. Add PAG Oil (if system was opened or components replaced): If you've replaced any components (compressor, condenser, evaporator, etc.), you'll need to add the correct amount of new PAG 46 oil. An entire system flush and refill typically requires 7.0 oz (207 mL) of PAG 46 oil, but individual component replacements will require varying amounts. Consult your service manual.
4. Charge with R-134a by Weight: The most accurate way to charge the system is by weight, using a precise charging machine. For your 2015 Ram 1500, the full system charge is 22 oz (624 grams) of R-134a. Never "charge by pressure" alone, as this can lead to over or undercharging, both of which can damage the system and reduce cooling efficiency.
5. Leak Check: After charging, always perform a thorough leak check to ensure there are no refrigerant leaks.

Common A/C Problems for This Generation Ram 1500

Owners of the 2009-2018 Ram 1500, which includes your 2015 model, have reported several common A/C issues:

• Compressor Failures: The A/C compressor can be a wear item. Symptoms include a loud grinding or knocking noise when the A/C is on, or the A/C blowing warm air intermittently or constantly. Regular maintenance, including ensuring proper refrigerant and oil levels, can help prolong compressor life.
• Condenser Issues: The condenser is located at the front of the vehicle and is vulnerable to damage from road debris, which can cause leaks. Reduced airflow through the condenser due to dirt or bent fins can also reduce cooling efficiency.
• Evaporator Leaks: Leaks in the evaporator core, located inside the dashboard, can be difficult and costly to repair due to the labor involved in accessing it. Symptoms often include a musty odor from the vents (due to refrigerant mixing with moisture) and a gradual loss of cooling performance.
• Blend Door Actuator Problems: While not a refrigerant issue, faulty blend door actuators can cause hot or cold air to blow out of the wrong vents, or prevent temperature control. This can sometimes be mistaken for an A/C system problem.

When to Call a Pro

Working with automotive A/C systems requires specialized knowledge, tools, and EPA 609 certification for handling refrigerants. Improper procedures can lead to personal injury, environmental harm, and expensive damage to your vehicle's A/C system.

If you're experiencing any A/C issues, lack the proper equipment, or are uncomfortable with the recharge procedure, it's always best to consult a certified professional. They can accurately diagnose the problem, safely recover and recharge the refrigerant, and perform necessary repairs.

Find a certified A/C shop on Repairius.