Juan Vite

Hello everyone im new here is my first Saab is a 1997 Saab 900 se turbo talladega I bought 1 week ago and I try to fix the a/c first when I get the car the fan control or acc control works good hot air but all the speeds works well and when I put some freon i noticed it was a leak on condenser lines so I fix it and now the compresor work engaged but the fan motor stop and then run sometimes high speed and sometimes really low speed i do the diagnosis doing off and auto and show me 0 and then 1 help me please I'm sorry for my English hope you can understand thanks