AC WON'T COOL

Question

MY AIR COND. IS 11 YRS OLD. I LIVE IN A DOUBLEWIDE HOME. THE PEOPLE THAT USED TO LIVE THERE NEVER HAD ANYTHING SERVICED. I HAD MY AC & HEAT PUMP SERVICED LAST YR. THE DRAIN PLUG INSIDE THE HOUSE HAD STOPPED UP & ROTTED MY FLOOR OUT. THE TECH SAID HE ALSO PUT FREON IN THE AC UNIT OUTSIDE. IT WORKED GREAT LAST SUMMER. THE HEAT WORKS GREAT BUT NOW THE AC WON'T COOL. THE OUTSIDE FAN USE TO HAVE HOT AIR COMING OUT OF IT WHEN IT WAS ON BUT NOW THE AIR IS COOL. CAN YOU GIVE ME SOME SUGGESTIONS AS TO HOW TO FIX THE PROBLEM.