98 ac problems

when i turn my ac only hot air comes out and like a lil air comes out not alot and after like 20 mins it starts to get a lil cold but not alot wat could da problem be im only 17 so i really dont kno about dat help me out :grinyes:

possible recharge.

thnx man i did that along time ago and it worked i guess it was that thnxs anywayz