See a specialist. System needs to be purged, leak checked & Recharged.....
No, an R134a compressor cannot directly replace an R22 compressor due to differences in refrigerant properties and system requirements. R134a and R22 operate at different pressures and have different lubrication needs, so using an R134a compressor in an R22 system could lead to inefficiency or damage. If converting from R22 to R134a, the entire system, including the compressor, evaporator, and condenser, typically needs to be modified or replaced to accommodate the different refrigerant.
R134a
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.
R134a.
Yes!
No you don't have to change the A/C Compressor.
You can't simply put R134a into an R12 system. You'd have to, at a minimum, change the hose connections and change the oil to PAG. the proper method to retro fit involves adding new charge port adapters, changing the oil in the compressor, and replacing the drier/accumulator. I know a lot of mechanics who do nothing more than add the port adapters and shoot in some extra pag oil.
The 134a plus just has PAG oil added already, so that you (theoretically) don't have to add it after adding the R134a.
A 2001uses R134a refrigerant.
It compresses the refrigerant (probably r134a) and pushes it through the ac system.
You are low on refrigerant, google R134a...
too much oil in system or compressor not working properly are some possibilities