Refrigerant R134A Characteristics: Combustibility
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2022 Audi S5 Sportback, 2022 Audi RS 5 Sportback, 2022 Audi A5 Sportback, 2021 Audi S5 Sportback, and 2021 Audi RS 5 Sportback. However, it is still accessible from the selected car via links, so may be relevant.
Refrigerant is non-flammable. It actually has a fire-resistant or fire extinguishing effect. Refrigerant decomposes when exposed to flames or red-hot surfaces. UV light (occurring for example during electric welding) also causes refrigerant decomposition. The resultant decomposition products are toxic and are not to be inhaled. However, irritation of the mucous membranes provides an adequate and timely warning.