Air conditions generally work when gas is compressed through an ice cold liquid and as the liquid is channelized into the coils the lines start fanning. It is a cyclical process that is based upon a complex technology. But since the line of this AC machines are mostly made of aluminum, they get punctured quite easily and thus cause breakdown of the entire machine. But if you get the right tools you can fix it on your own.
First of all with the help of a wire brush you should clean the line of your AC machine to make it grime and dirt free. Now with steel wool start wiping the lines and continue the process until it gets totally cleaned. Then the AC line should be joined with the melted aluminum flux and it should be left for cooling for fifteen minutes. Then the line must be buffed with a piece of cloth.