S80 aircondition problem. Hot air blowing after sometime

[Ibro]

Hi

I have s80 2011. After buying the car no issues with AC for several months . Started to have issues after driving for sometime hot air will blow out . Refrigerant was replaced did not solve the problem

New AC compressor installed . Still the problem would happen but takes a bit more time to statt blowing hot air or does not happen as often as before . What other parts could be causing this ? Anything needs to be checked or replaced as well?

Thanks