working not working now working?

2002 kitchenaid superba side by side stopped cooling sufficiently so i replaced it and put it in my garage for futher troubleshootting now it is cooling fine settings were on coldest. Before pluging it back in it I set them to recomended settings.now the freezer is at 10 degrees and the freshfood side is at 34. Gaskets are still good and no strange sounds and only runs whenout of temp. One side note a week before it starting acting up the freezer door was not completely shut over night. any ideas is the frig ok i would hate to sell to some one just to have it stop working on them. thanks