You need to just find a different shop. This is a clear, colorless, odorless, pressurized gas. You need either a very high grade electronic leak detector or add U/V dye to the system and look for a leak with a U/V light and glasses. This requires a real talent and a lot of experience but there is no question the leak is there, they just aren't smart enough to find it. This is a sealed system. A leak is the only way for the refrigerant to come out. Some components are very hard to access and leak check also so you need someone that specializes in or does a real lot of A/C work to find it. DO NOT use any of those snake oil sealers sold. All they do is plug up the system and everybodies equipment.
Monday, August 16th, 2010 AT 5:00 PM