GOLF 96 Light and Fan question.

Hello all I am new to the forum and I also have a new used car it is a 96 VW Golf GL I love it, but there is 2 things I find wrong. One being the airbag light on the side dash board stays on and after I turn of my car the fan still runs sometimes it shuts of other times it stays on longer. I am new to cars and don't know a lot and any help will be great thanks.