2014 Ford F-350 Super Duty A/C Refrigerant and Oil Specifications

Quick answer

• Refrigerant type: R-134a
• Full system charge: 42 oz (1191g)
• PAG oil type: PAG 46
• PAG oil amount: 7 oz (207 mL)
• Low-side service port location: Near the passenger-side firewall, on the line from the accumulator.
• High-side service port location: In front of the passenger-side shock tower, on the line from the A/C compressor.

Why R-1234yf matters

While your 2014 Ford F-350 Super Duty uses R-134a, it's important to be aware of the newer R-1234yf refrigerant. Starting in the mid-2010s, vehicle manufacturers began transitioning to R-1234yf due to its lower global warming potential (GWP). The EPA has mandated this change to reduce the environmental impact of automotive air conditioning systems. R-1234yf has a GWP of just 4, compared to R-134a's GWP of 1,430. This means that R-1234yf is significantly less harmful to the environment.

However, R-1234yf is also more expensive than R-134a and requires specialized equipment for service. R-1234yf systems operate at different pressures than R-134a systems, so they require their own dedicated recovery and recycling machines. Cross-contamination of refrigerants can damage A/C components and lead to costly repairs, so it is crucial to use the correct equipment and procedures for each type of refrigerant.

Recharge procedure

A proper A/C recharge is not just about adding refrigerant. It is a precise process that should be performed by a certified technician. The first step is to recover any remaining refrigerant from the system using a recovery machine. Then, the system must be evacuated to remove any air and moisture. This is a critical step, as air and moisture can mix with the refrigerant and oil to form corrosive acids, which can damage A/C components.

Once the system has been evacuated, the correct amount of refrigerant and oil must be added. The refrigerant charge is measured by weight, not pressure. Overcharging or undercharging the system can lead to poor cooling performance and can even damage the A/C compressor. The correct amount of PAG oil is also critical for lubricating the A/C compressor and other components.

Common A/C problems for this vehicle

The 2011-2016 Ford F-Series Super Duty trucks are known for a few common A/C problems:

• Compressor failure: The A/C compressor is the heart of the system, and it is a common failure point on these trucks. The compressor can fail due to a variety of reasons, including leaks, clogs, and electrical problems.
• Condenser issues: The A/C condenser is located in front of the radiator, and it is susceptible to damage from road debris. A damaged condenser can leak refrigerant and cause the A/C system to fail.
• Evaporator leaks: The A/C evaporator is located inside the dashboard, and it can develop leaks over time. An evaporator leak can be difficult to diagnose and repair, and it often requires the removal of the entire dashboard.

When to call a pro

While some basic A/C maintenance tasks can be performed by a DIY-er, it is always best to leave A/C repairs to a certified professional. A/C systems are complex and require specialized equipment for service. A certified technician will have the knowledge and experience to properly diagnose and repair any A/C problem.

Disclaimer: It is illegal to work on automotive A/C systems without EPA 609 certification. Attempting to service your own A/C system without the proper training and equipment can be dangerous and can result in damage to your vehicle.

Find a certified A/C shop on Repairius.