My a/c wasn't cooling very well so I called a contractor. He found a collapsed air return and open duct in the attic, but said there was also a restriction in the system. The dryer was in bad shape so he took it off, blew out the system, put on a new drier, and put the freon back in. (There was no leak in the system.) He rechecked the system and said there was still a restriction and that he would have to replace the coil in the attic and he would have to come back to do that. Since he left 3 days ago, my a/c is cooling like it used to. Is it possible that restriction resolved after he left?
The duct and collapsed return have not been repaired yet.