Brought my truck in for a second opinion on my auto a/c. The first place I brought it to told me that I had cool components under the hood but none of it was getting into the cab. I brought it to Firestone for a second opinion, they said I needed to fix the entire a/c unit. Brought it back to the first shop I went to and they said my a/c was no longer running cool under the hood. I'm not an expert detective, but I suspect that my freon was drained at Firestone so they could add the extra service on.