I bought a 94 civic from a friend about a year ago. It had been sitting for 6 months but friend said the "a/c system was replaced" about a year before that. When I got it, the A/C would blow but not cold. I figured it had a leak so I took it to a mechanic which confirmed the leak, fixed it, and recharged it. Since then it blows cooler, but not cold, and takes forever to get cool in the first place. It can take 15 minutes to get it to blow 70 degrees if it is in the 90s outside. The coldest it will blow is about 65 or so and that is only when moving at highway speeds. I took it back to the mechanic and he checked it over for leaks and said there were none. After more diagnosis he said the only thing he can figure is that the compressor was "weak" and couldn't build up the appropriate pressures. He didn't charge me for the 2nd diagnosis, but wanted ~$400 for a new compressor. I've never heard of a "weak" compressor and due to the fact that it only couple years old, I am finding this hard to believe. Any ideas? Is this diagnosis plausible?