2020 Ford F-350 Super Duty A/C Refrigerant & Oil Capacity

Quick Answer

• Refrigerant Type: R-1234yf
• Full System Charge: 22 oz (624 grams)
• PAG Oil Type: PAG 46 (Specific Ford-approved variant, typically Motorcraft YN-12-D or equivalent)
• PAG Oil Amount: 7.0 fl oz (207 mL)
• Low-Side Service Port Location: On the suction line, typically near the accumulator/drier, on the passenger side of the engine compartment.
• High-Side Service Port Location: On the discharge line, typically between the condenser and the compressor, on the passenger side of the engine compartment.

The 2020 Ford F-350 Super Duty utilizes R-1234yf refrigerant, reflecting the automotive industry's transition from R-134a due to environmental regulations. This modern refrigerant requires specific handling procedures and equipment, as outlined by EPA Section 609.

Why R-1234yf Matters

R-1234yf is a hydrofluoroolefin (HFO) refrigerant with a significantly lower global warming potential (GWP) compared to its predecessor, R-134a. This makes it a more environmentally friendly choice, actively reducing contributions to climate change. However, this advancement comes with a few implications:

• Cost: R-1234yf is generally more expensive than R-134a due to its newer technology and production processes.
• EPA Regulations: The Environmental Protection Agency (EPA) mandates specific handling and disposal procedures for all refrigerants, including R-1234yf. Technicians who service automotive A/C systems must be Section 609 certified.
• Recovery Machine Requirements: Due to its mild flammability and specific properties, R-1234yf requires dedicated recovery, recycling, and recharging machines. These machines are designed to safely and efficiently recover the refrigerant without cross-contamination, which is crucial for system performance and environmental protection.

Recharge Procedure (High-Level)

Recharging your 2020 Ford F-350 Super Duty's A/C system is not as simple as adding a can of refrigerant until the vents blow cold. Proper procedure is critical for system longevity and efficiency:

1. Evacuation: The system must be thoroughly evacuated using a vacuum pump to remove all air and moisture. Moisture in an A/C system can lead to acid formation, corrosion, and compressor failure.
2. Leak Detection: Before recharging, the system should be checked for leaks using appropriate tools like a refrigerant leak detector or UV dye.
3. Proper Charge by Weight: The most critical step is to charge the system with the precise amount of refrigerant by weight, not by pressure. Using an A/C charging machine that measures refrigerant by weight ensures the system receives the exact quantity specified by Ford (22 oz or 624 grams). Overcharging or undercharging can both lead to poor performance and potentially damage the compressor.
4. PAG Oil: Ensure the correct type and amount of PAG (Polyalkylene Glycol) oil is present. The 2020 F-350 Super Duty requires PAG 46 oil. If components are replaced, a portion of the total oil charge will need to be added back into the system.

Warning: Working with refrigerants and automotive A/C systems requires specialized knowledge, tools, and safety precautions. Improper handling can lead to personal injury, environmental damage, and costly vehicle repairs. Always wear appropriate personal protective equipment, including eye protection and gloves.

Common A/C Problems for This Vehicle

Even with a robust system like the F-350's, certain A/C issues can arise:

• Compressor Failures: The compressor is the heart of the A/C system. Failures can stem from lack of lubrication (low oil), contamination, or electrical issues. Symptoms include a loud grinding noise, A/C not blowing cold, or the compressor clutch not engaging.
• Condenser Issues: The condenser, located in front of the radiator, is susceptible to damage from road debris. A blocked or damaged condenser can restrict airflow and hinder heat exchange, leading to poor cooling performance.
• Evaporator Leaks: The evaporator, located inside the dashboard, can develop leaks. These are often harder to diagnose as they are not visible and can manifest as a musty odor from the vents (due to refrigerant and oil residue) and a gradual loss of cooling.
• Blend Door Actuator Problems: While not a refrigerant issue, a faulty blend door actuator can prevent proper temperature control, leading to diagnostics that might initially suggest a refrigerant problem.

When to Call a Pro

Given the complexity of modern A/C systems and the specific requirements of R-1234yf refrigerant, it is strongly recommended to consult a professional for any A/C issues. A certified technician has:

• EPA 609 Certification: Legally required to work with refrigerants.
• Specialized Equipment: For proper recovery, recycling, and recharging of R-1234yf.
• Diagnostic Expertise: To accurately identify the root cause of A/C problems.

Attempting to self-diagnose or repair an R-1234yf system without the proper training and equipment can lead to further damage, personal injury, and environmental harm. Trust your F-350's A/C system to a professional.

Find a certified A/C shop on Repairius.