When doing a/c you have to be careful on how you do this. You gave no temp/pressure relation as the 242 doesn't sound to high, but at what temp? The 47 seems high so i'd suspect you have to much freon in the system. A can of freon isn't a pound it's usually 12 or 13 ozs. And if your system says it take s 1 pound 4 ounces then that means 16 ounces total. You need to know the temp outside to relate the pressure to it to stop putting freon in when it gets to pressure. You also can't do this at idle as it will change due to copressor speed at about 1500 rpm. If you took it to a person to check in the first place and it was ok then, then the mechanic should have fixed it to begin with, if not he isn't to reliable of a business.
Wednesday, July 21st, 2010 AT 9:02 AM