2025 International LT: A/C Refrigerant & Oil Specifications

Quick Answer

• Refrigerant Type: R-1234yf
• Full System Charge: 48 oz (1360g)
• PAG Oil Type: PAG 46
• PAG Oil Amount: 8.1 oz (240 mL)
• Low-Side Service Port Location: Near the driver's side firewall
• High-Side Service Port Location: In front of the passenger side front wheel, near the bottom of the condenser.

Why R-1234yf Matters

The 2025 International LT, like all modern vehicles, uses R-1234yf refrigerant. This is a significant change from the R-134a used in older vehicles. R-1234yf is much more environmentally friendly, but it's also more expensive and requires special equipment to handle. You can't just top off an R-1234yf system with a can from the auto parts store. You need a dedicated R-1234yf machine to recover the old refrigerant and charge the system with the correct amount of new refrigerant.

Recharge Procedure

A proper A/C recharge is not a simple top-off. The system must be evacuated to remove all the old refrigerant and any moisture that may have entered the system. Then, the correct amount of refrigerant, by weight, is added. Do not use pressure gauges to determine the correct charge. This is especially important with R-1234yf systems, which are very sensitive to the amount of refrigerant in the system.

Common A/C Problems for this Vehicle

While the 2025 International LT is a new vehicle, there are some common A/C problems that can occur on this generation of trucks:

• Compressor failures: The A/C compressor is a common failure point on all vehicles, and the International LT is no exception.
• Condenser issues: The condenser is located at the front of the vehicle, so it is susceptible to damage from rocks and other road debris.
• Evaporator leaks: The evaporator is located inside the cab, and a leak can be difficult to diagnose. A musty smell from the vents is a common sign of an evaporator leak.

When to Call a Pro

Because of the special equipment and training required to work with R-1234yf, it is best to leave A/C repairs to a professional. A certified A/C shop will have the right equipment to do the job correctly and safely.

Disclaimer: The information in this article is for informational purposes only. It is not intended to be a substitute for professional advice. Always consult with a qualified technician before performing any work on your vehicle. You must be EPA 609 certified to work on A/C systems.

Find a certified A/C shop on Repairius.