2004 w/30K miles, a/c works on cold start then stops after awhile.Air flow which was initially cold/cool thenis no longer cool. Any thoughtsor info on similar problems would be appreciated.Thanks, Walt

It's possible the last person who charged the AC system may have over charged it. Have a shop check it out. It will be worth the inspection fee if they drain the system and recharge it. Work with them and they will work with you.