Refrigerant types are not to be mixed. The usage of dyes and sealants is discouraged. Dyes and sealants are considered contaminants and will reduce the performance and longevity of the lubricant. Use refrigerant sniffers for leak detection and repair leaking equipment per SAE and EPA guidelines.
The two different gasses should not be mixed. You cannot fit the 1234yf connectors on a 134A system anyway as they are different sizes.
HFO-1234yf (R-1234yf ) has a global warming impact value of 1 versus 1300 for R-134a. It breaks down chemically in the atmosphere in only 11 days versus 13 years for R-134a! While R-1234yf oils are backwards compatible with R-134a systems, R-134a PAG oils are not compatible with R-1234yf systems.
The above research indicates that R1234yf can be used as a drop-in replacement for R134a, meaning that automotive manufacturers do not need significant modifications. Currently, the main issue with R1234yf is its mild flammability.
R-134a and R-1234yf systems have unique fittings so they can only be used with the appropriate corresponding refrigerants and equipment. R-1234yf is very expensive. This has led to end-users trying to replace the refrigerant in vehicles originally containing R-1234yf with R-134a, in an attempt to save money.
Still, the answer is an emphatic, “No.” Not only would a retrofit of this type negate the environmental benefits of R-1234yf, but it would also be a violation of Federal Law under Section 203 of the Clean Air Act: “tampering” with a vehicle's emissions control device.
There are three refrigerants that can be used to replace R-134a: R-1234yf, R-152a, and R-744.
However when the condensing temperature gets lower, R1234yf outperformed R134a. Over the range of operational conditions tested, the maximum difference in terms of cooling capacity is less than 5% and the COP is less than 10%.
The commonly used synthetic refrigerants such as R134a, R407C and R410A have a GWP value higher than 2,500. As a result, their production is being phased out.
Switching to R1234yf refrigerant is a step towards a greener future, but it comes with higher costs due to advanced equipment, stringent regulations, and specialized training.
Most vehicles have a label or sticker under the hood that indicate whether the refrigerant used is R-134a or R-1234yf.
In with the new
The new refrigerant type uses ND-oil 12, also a PAG 46 oil but with additives specifically for the R1234yf type refrigerant.
In short, the answer is, "No!" Automotive refrigerants are volatile compounds that can have a negative effect on the environment. Combining them can have adverse effects, and cause damage to your car's A/C system.
The ACX universal flushing unit is designed for refrigerants R134a and R1234yf. A proper flush of the air conditioning system is one of the most important tasks to be carried out during repairs and after the replacement of a compressor.
Refrigerant types are not to be mixed. The usage of dyes and sealants is discouraged. Dyes and sealants are considered contaminants and will reduce the performance and longevity of the lubricant. Use refrigerant sniffers for leak detection and repair leaking equipment per SAE and EPA guidelines.
It is anticipated that by 2025 all vehicles will contain 1234YF. Don't fret, however, if your current vehicle requires 134a. Though 134a is not compatible with 1234YF and is expected to be phased out, it is still in production and will continue as long as there is a demand for repair of older vehicles.
R134a has been found to have a lot of greenhouse gas potential, as it can end up in the atmosphere and take forever to break down. For that reason, all new vehicles sold in America after the year 2021 can no longer use this type of refrigerant.
R-1234yf refrigerant. To date, most auto manufacturers are using the hydro fluoro olefin (HFO) refrigerant R-1234yf as the replacement of choice for R134a.
Most cars hold between 28 and 32 ounces of refrigerant (or about 2—3 12oz cans), however larger vehicles and those with rear A/C will likely hold more. Check your vehicle manual for the system capacity for your specific vehicle.
Solstice® yf (R-1234yf) refrigerant is a near drop-in replacement for R-134a in automobile A/C applications, helping automakers around the world comply with EU low GWP requirements.
Possible alternatives to R-134a
Attention is increasingly focused on low-GWP refrigerants that are hydrofluoroolefins (HFO). R-1234yf in particular is often seen as a possible alternative to R-134a. The GWP value of R-1234yf is 4, which means it has a very low global warming potential.
Lower Global Warming Potential (GWP): 1234yf refrigerant has a significantly lower GWP compared to 134a, making it a more environmentally friendly option.