I think ac clutch or compressor has failed. Car is making a horrible constant clicking noise with ac off or on and air is blowing hot. It was blowing warm and added some r134a it was working great for about 2 days and then clicking noise started and clutch is trying to move on compressor but is getting stuck. Only moves about 1/4 inch and then stops. I can get a new compressor for about $400 bucks. Im sure this is over $1,000 at dealer. O know I will need to get it recharged. Anyone ever do a compressor change???