Not to burst any ones bubble,Look I gave my wife a 90,420sel AC,was not working,it had a crack in the hose from the drier to the evaporator, i replaced the drier and hose,evacuated the system for 24 hours,reinstalled freon (freez 12) and have not had a moments trouble.The air will freez you out.I keep it set at 70 and it gets very cold.By the way I live in Central LA.