The air conditioning has not worked on my 2003 Honda for about 1 year or so now. The weird thing is that right around the time it was going to break, the vents on the left side of the car was not putting out cooled air, but the right side was.
When it eventually stopped working all together, I had a guy come over and charge up the freon using a kit that I bought online. Right after he did it, when I turned on the AC, I can hear it got "bzzzzz, psssssst, bzzzz, psssst...". I think it was leaking out.
After that I took it to a shop and they supposed fixed it. They said that the temp got down pretty low inside the car. I tested it and they were right. I didn't need to use the AC much since it got fixed. However 6 months later (aka now) I really need the AC. When I turned it on, I occasionally would get the bzzzz, pssssst, bzzzz when I accelerate. The symptom of the left side vent not putting out cooled air is still there. The right side only puts out minorly cooled air.
My question is, what could be happening? I'm sure there's a leak in the system. Why is it that one side doesn't work but the other side might work sometimes?
What is the most cost efficient way to remedy the problem(s)?