What hapens when you put R134A into a R22 compressor?

Putting R134A into a R22 compressor can lead to several issues. R22 and R134A have different pressure and temperature characteristics, which can cause the compressor to operate inefficiently or even damage it. Additionally, R22 is a mineral oil refrigerant, while R134A requires a synthetic oil for proper lubrication, potentially leading to oil breakdown and compressor failure. Overall, using R134A in a R22 system is not advisable and can result in significant performance and reliability problems.