2019 Jeep Wrangler A/C Refrigerant & Oil Specifications

Quick Answer: 2019 Jeep Wrangler (JL) A/C Specs

• Refrigerant Type: R-1234yf
• Refrigerant Charge: 16.0 oz (454g)
• PAG Oil Type: PAG 46 (ND-12)
• PAG Oil Capacity: 4.4 oz (130 mL)
• Low-Side Port Location: Near the firewall on the passenger side, behind the shock tower.
• High-Side Port Location: In front of the radiator, near the hood latch.

Why R-1234yf Matters

If you're used to working on older vehicles, you might be surprised to find your 2019 Wrangler uses R-1234yf refrigerant instead of the old R-134a standard. The transition to R-1234yf began in the mid-2010s due to environmental regulations. R-1234yf has a much lower Global Warming Potential (GWP) than R-134a, making it a more eco-friendly choice.

However, this change comes with a few important considerations:

• Cost: R-1234yf is significantly more expensive than R-134a.
• Specialized Equipment: You cannot use an R-134a manifold gauge set or recovery machine on an R-1234yf system. The service ports are a different size to prevent cross-contamination. You must use equipment specifically designed for R-1234yf.
• Flammability: R-1234yf is mildly flammable. While it poses a very low risk in the hands of a trained technician, it's another reason why specific recovery and handling procedures must be followed.

A/C Recharge Procedure

A proper A/C service is not just "topping off" the system. To ensure longevity and performance, the system must be recharged by weight, not by pressure.

1. Recovery: The first step is to recover any existing refrigerant from the system using an SAE-certified R-1234yf recovery machine.
2. Evacuation: A deep vacuum must be pulled on the system for at least 30-45 minutes. This removes any air and moisture, which can cause poor performance and system damage.
3. Charging: The system is then charged with the precise weight of refrigerant specified—16.0 oz (454g) for the 2019 Wrangler. Do not use pressure gauge readings to determine the charge amount.

Common A/C Problems for the Jeep Wrangler (JL)

While generally reliable, the JL Wrangler A/C system can experience a few common issues:

• Condenser Damage: The Wrangler's iconic seven-slot grille is wide open, making the condenser vulnerable to rocks and road debris. A punctured condenser will leak refrigerant, causing the A/C to stop working.
• Compressor Failure: The A/C compressor is the heart of the system. While not a widespread issue, failures can occur. Symptoms often include a grinding noise when the A/C is turned on, or a complete lack of cooling.
• Evaporator Leaks: The evaporator core is located inside the dashboard and is a labor-intensive repair. Leaks can sometimes be identified by a sweet smell inside the cabin or an oily residue on the passenger side floor.

When to Call a Pro

Due to the specialized equipment and training required to handle R-1234yf, A/C service is often best left to a professional. If your Wrangler's A/C isn't blowing cold, a certified shop can perform a leak test to pinpoint the problem before performing a proper evacuation and recharge.

Safety Disclaimer: You must be EPA 609 certified to legally purchase and handle refrigerants. Always wear safety glasses and gloves when working with A/C systems.

Find a certified A/C shop on Repairius.