Refrigerant R1234YF, Physical Characteristics

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

The vapor pressure curves of both refrigerant R1234yf and R134a are very similar across a wide temperature range; therefore, it is not possible to distinguish between both refrigerants. Refer to REFRIGERANT VAPOR PRESSURE TABLE and A/C System, General Information . Differentiating is only possible using sensors that can analyze the chemical composition of the refrigerants. Refer to REFRIGERANT R1234YF ANALYSIS .
With R1234yf, the A/C compressor is lubricated with special synthetic refrigerant oils, for example PAG oils (polyalkylene glycol oils) which are specified to the refrigerant R1234yf, the A/C compressor and the operating conditions of the specified additions (additives).