2019 Volvo VNR A/C Refrigerant and Oil Specifications

Quick answer

• Refrigerant type: R-1234yf
• Full system charge: 44.0 oz (1250g)
• PAG oil type: PAG 46
• PAG oil amount: 6.8 oz (200mL)
• Low-side service port location: Near the passenger side hood hinge, firewall.
• High-side service port location: Near the passenger side hood hinge, firewall.

Why R-1234yf matters

The transition from R-134a to R-1234yf refrigerant in modern vehicles like the 2019 Volvo VNR is significant for a few reasons. R-1234yf has a much lower global warming potential (GWP) than R-134a, making it a more environmentally friendly choice. However, this comes at a cost. R-1234yf is more expensive per pound than R-134a, and it requires specialized, more expensive equipment for service and recovery. This is due to its slight flammability, which necessitates different handling procedures and service machines to prevent any risk of ignition.

Recharge procedure

A proper A/C recharge on a 2019 Volvo VNR is not a simple DIY task. The system must be fully evacuated of all existing refrigerant and moisture using a recovery machine. This is a crucial step that is often skipped, leading to poor performance and potential damage to the A/C system. Once evacuated, the system should be recharged with the precise weight of refrigerant specified by the manufacturer—in this case, 44.0 oz (1250g). Attempting to charge the system based on pressure readings alone is inaccurate and can lead to over or undercharging, both of which will cause problems.

Common A/C problems for this vehicle

While the Volvo VNR is a robust truck, some common A/C issues can arise. Compressor failures are a known issue, often due to internal wear and tear or loss of refrigerant and oil. Condenser damage is also common, as the condenser is located at the front of the vehicle and is susceptible to impacts from road debris. Evaporator leaks can also occur, though they are less common and more difficult to diagnose as the evaporator is located within the HVAC case in the dashboard.

When to call a pro

Due to the complexity of modern A/C systems and the specific requirements of R-1234yf, it is highly recommended to have any A/C service on a 2019 Volvo VNR performed by a certified professional. If you are experiencing A/C problems such as warm air from the vents, strange noises from the compressor, or a system that will not hold a charge, it's time to call in a pro. They will have the proper equipment and expertise to diagnose and repair the issue correctly and safely.

Safety Disclaimer: The EPA requires that anyone servicing a motor vehicle A/C system be certified under Section 609 of the Clean Air Act. Handling refrigerants without proper certification is illegal and can be hazardous.

Find a certified A/C shop on Repairius.