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What refrigerant is in the Ford Transit 350?

The exact refrigerant for the Ford Transit 350 depends on the model year and market. In most newer Transits, Ford has moved to R-1234yf, while older or some regional variants still used R-134a. Always verify with the vehicle’s service label or a Ford dealer using the VIN.


Understanding the refrigerants used in the Transit 350


Ford’s air conditioning systems have evolved over time, shifting from R-134a to the lower-GWP R-1234yf. The refrigerant type you find in a specific Transit 350 is dictated by its build year and regional production. This distinction matters for service, as the two refrigerants require different oils and recovery equipment and cannot be mixed.


Two main refrigerants you may encounter


Here are the two refrigerants you might find in Transit 350 models, depending on their build year and market.



  • R-134a (Tetrafluoroethane) — Used in older Transit 350s and certain regional variants. Recharge and maintenance for 134a require compatible oils and equipment designed for this refrigerant.

  • R-1234yf (HFO-1234yf) — The modern standard in many newer Ford vehicles, including many late-model Transits. It has a lower global warming potential and requires 1234yf-compatible service gear and oils.


In practice, the refrigerant type is indicated on the vehicle’s service label inside the engine bay. A Ford dealer can confirm the exact specification from the VIN if you’re unsure.


How to determine which refrigerant your Transit 350 uses


To know for sure, follow these steps, then proceed with the correct service procedures.



  1. Look for the A/C service label on the engine bay or near the refrigerant lines; it will indicate R-134a or R-1234yf.

  2. Check the owner's manual or a Ford service bulletin for your model year and market.

  3. Provide your VIN to a Ford dealer or authorized A/C shop; they can pull the exact refrigerant specification from the vehicle’s build data.

  4. Inspect the A/C compressor and refrigerant ports if you have professional access; service equipment and hoses are labeled for the refrigerant type.


Knowing the refrigerant type before servicing prevents cross-contamination, which can damage the system and void warranties.


Maintenance considerations and safety notes


Before performing any A/C work, it’s important to understand the requirements for each refrigerant type and the safety implications.



  • Do not mix refrigerants. R-134a and R-1234yf are not interchangeable and require dedicated recovery and recharge equipment.

  • Use the proper oil and a compatible lubricant for the refrigerant type (POE oil for many 134a systems; specific PAG oils for 1234yf systems).

  • R-1234yf is mildly flammable (A2L). Service should be performed by a certified technician with appropriate ventilation and equipment. R-134a is non-flammable but has its own safety precautions.

  • If replacing components (compressor, condenser, or receiver-drier), ensure the entire system is flushed with the correct refrigerant oil and that a new accumulator/drier is installed as required by Ford service guidelines.


Following these guidelines helps protect the system and maintain warranty coverage.


Regional variations and model-year notes


Regional regulations and Ford’s production timeline influence the refrigerant used. In many regions, newer Transit 350 models utilize R-1234yf, while older builds or certain regional variants may still use R-134a. The definitive answer for your van is the service label or Ford’s VIN-based documentation.


For owners or fleet managers, the key takeaway is to verify the refrigerant type before any recharge or repair and to rely on a trained technician equipped for the specific refrigerant in use.


Summary


The Ford Transit 350’s refrigerant varies by year and market. Most newer models use R-1234yf, while older or some regional models may use R-134a. Always verify with the vehicle’s service label or a Ford dealer using the VIN, and ensure that service and charging are performed with the correct refrigerant and oil by a qualified technician.


In short: know the refrigerant, use the right tools, and rely on professional service to keep the van’s air conditioning running reliably.

What kind of freon does a Ford F350 take?


R134A Refrigerant
Ford F350 R134A Refrigerant - AutoZone.



What kind of gas goes in a Ford Transit 350?


Your vehicle is designed to operate on regular unleaded gasoline with a minimum pump (R+M)/2 octane rating of 87. Some fuel stations, particularly those in high altitude areas, offer fuels posted as regular unleaded gasoline with an octane rating below 87.



Why is my Ford Transit AC not blowing cold air?


It might indicate a blockage or an issue with the airflow system preventing the cold air from circulating throughout the van. Additionally, the refrigerant may not be adequately charged, or there could be a less apparent electrical problem. It's advisable to inspect the entire AC system thoroughly.



What coolant goes in a Ford Transit van?


ZEREX – G05® Full Strength Concentrate Antifreeze / Coolant, 1 Gallon (Part No. ZXG051)


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.