Hi, I'm new here and just got an 07 TL Type S. It had a brand new A/C compressor when I bought it but wasn't blowing out cold air. I charged it with r134a refrigerant and A/C was blowing somewhat cold for a few days and now its blowing out hot air again. Anyone know what this could be?

 

...a leak in the system somewhere. Need a set of manifold guages so you can diagnose the problem....hopefully your compressor still engages.