Ok just recently when I put my defrost or AC on for that matter the compressor pulley stops spinning and the engine belt just drags across the stopped pulley causing it to warp and wear down the belt and resulting in a horrible rubber smell. What do I need to do hear, i heard that this may be due to low freon but i doubt that, is the clutch bad or do I need a whole new compressor? Also why does the defrost cause the compressor to go on in the first place? Thanx please help guys anyone had this problem b4