R1234yf hit the scene in 2011. It’s got a lower GWP, but it’s flammable, so it’s not a straight swap for R134a. Still, you’ll see it in newer vehicles.
R744 (CO2) is the latest eco-friendly option, but switching over from R1234yf or R134a isn’t a walk in the park. High pressures and safety issues mean you’ll need new skills and new A/C service units.
Changes in Vehicle Air Conditioning Servicing
R1234yf has shaken up how we service vehicle A/C systems. Key differences compared to R134a include:
- R1234yf is a different animal, so you’ll need the right gear to handle it.
- Safety rules are tighter with R1234yf. Your service units need built-in features to keep the refrigerant where it belongs.
- Don’t try to use your old R134a gear. R1234yf needs its own dedicated service units. There’s an upfront cost, but it’s the only way to do it right.
- R1234yf service units need to run regular self-tests to catch leaks before they become a problem. Look for features such as ventilated couplers to minimise refrigerant loss.
- Don’t skip regular refrigerant analysis. It’s key to avoiding cross-contamination and keeping your system running smoothly.
Combo units for R134a and R1234yf are available, but they’re pricier and more complex. Plus, you can only service one refrigerant at a time, which might limit your turnaround times if you’re busy.
Considerations Servicing A/C Systems with R1234yf
Working on hybrids and EVs with R1234yf? You’ll need the right tools and a solid handle on the rules to get the job done safely.
First things first: use the right oils and UV additives. R1234yf systems need oils made just for them, and you’ve got to keep everything dry. VeriCool’s bottle system makes storing these fluids safe and easy.
Never mix refrigerants. R134a and R1234yf have different parts and safety needs. The wrong refrigerant can wreck the system and put your safety at risk.