2001 Cadillac DeVille Q&A

2001 Cadillac DeVille Question: Why is my a/c blowing hot air when I put my a/c on?

Was installing a radio yesterday shortly after the air was blowing cold then all of a sudden it started blowing hot air the compressor is on but making funny noise the coolent is almost full -
Answer 1
COULD BE MANY ISSUES SEEK DIAG AND EST -