I would like to preface this reply with the fact that I am NOT an expert at this stuff. However, I have messed around with fridges a little bit. First, is the fan spinning fast enough? Sometimes they spin too slowly because they rub against something and you can pull them out a bit to get them spinning nice and fast. Also, is the compressor hot? If so, it may be the start device or the overload relay. Both these problems are fixable, and you can find out how by just googling them. Also, it may be a freon leak, but that is not as likely.