2015 Ram ProMaster A/C Refrigerant & Oil Capacity

Quick Answer

• Refrigerant Type: R-134a
• Full System Charge: 22.93 oz (650g)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 6.76 oz (200mL)
• Low-Side Service Port Location: On the accumulator/drier, near the firewall on the passenger side.
• High-Side Service Port Location: On the liquid line, typically closer to the condenser at the front of the vehicle.

Why R-1234yf Matters (Though Not Applicable Here)

While your 2015 Ram ProMaster uses R-134a, it's important to understand the industry transition to R-1234yf. This newer refrigerant became standard for most new vehicles starting around 2014-2017 due to its significantly lower Global Warming Potential (GWP). R-1234yf is more environmentally friendly but also more expensive and requires specialized recovery and charging equipment. The good news is that for your 2015 ProMaster, you'll find R-134a systems simpler and less costly to service, as the refrigerant is widely available and the tooling is more common.

Recharge Procedure (High-Level)

Recharging your ProMaster's A/C system is not as simple as just adding a can of refrigerant. Proper procedure is critical for system longevity and performance. Always emphasize these steps:

1. Evacuation: The system must be evacuated to remove all air and moisture. Moisture in the A/C system can lead to acid formation, corrosion, and compressor failure. A vacuum pump should pull at least 29.92 inHG (750 mmHg) for a sustained period.
2. Leak Testing: Before charging, the system should be leak-checked. This can be done by observing if the vacuum holds or by using a nitrogen charge with a leak detector.
3. Proper Charge by Weight: This is the most crucial step. Always charge the system by weight, not by pressure. Using a A/C charging machine or a scale with individual cans ensures the correct amount of refrigerant, as specified above (22.93 oz or 650g), is added. Overcharging or undercharging can both lead to poor cooling performance and potential damage to the compressor.
4. PAG Oil Considerations: If components have been replaced (e.g., compressor, condenser, evaporator), the appropriate amount of PAG 46 oil (6.76 oz or 200mL) must be added. Refer to the manufacturer's service information for specific component oil capacities.

Common A/C Problems for the 2015 Ram ProMaster

Like many commercial vehicles, the Ram ProMaster can experience certain A/C issues due to demanding usage or inherent design characteristics:

• Compressor Failures: The A/C compressor is a common failure point. This can be due to a lack of lubrication (often from low refrigerant leading to low oil circulation), system contamination, or simply wear and tear. Symptoms include a loud whirring or grinding noise, inability to cool, or the clutch not engaging.
• Condenser Issues: The condenser, located at the front of the vehicle, is susceptible to damage from road debris. A damaged condenser can leak refrigerant or become clogged externally, impeding heat transfer and system performance.
• Evaporator Leaks: Over time, the evaporator core, located inside the dashboard, can develop leaks. These are often difficult to diagnose and repair, usually requiring significant dashboard disassembly. Symptoms include a sweet, musty odor and unexplained refrigerant loss.
• Blend Door Actuator Failures: While not a refrigerant issue, failed blend door actuators are common and can make it seem like the A/C isn't working properly, as air may not be directed to the correct vents or tempered properly.

When to Call a Pro

Given the complexities of A/C systems, the precision required for charging, and the environmental regulations surrounding refrigerants, it is highly recommended to call a certified professional for any significant A/C issues. An EPA 609 certified technician has the proper equipment and knowledge to safely and effectively diagnose and repair your ProMaster's A/C system.

Safety Disclaimer: Automotive A/C systems contain refrigerants under high pressure. Refrigerant can cause frostbite or eye injury upon contact, and inhaled refrigerant can displace oxygen, leading to asphyxiation. Never attempt A/C repairs or refrigerant handling without proper training, personal protective equipment, and EPA 609 certification. Releasing refrigerant into the atmosphere is illegal.

Find a certified A/C shop on Repairius.