I filled up A/C with r134a several days ago. Was running great nice and cold for about 3 days. Got Into car yesterday started car and it's making​a horrible ticking noise while AC is off or on and it's blowing hot air. I can see the clutch on compressor is trying to turn while AC is on. I can spin clutch about about a 1/2 a turn while veh is off. Think it's my compressor or clutch?? Any thoughts.