I have just bought an N reg Galaxy from my sister in law, which with a lot of tlc has scrubbed up ok. The sunroof doesn't work, but I can live with that, but the fans don't seem to do anything, so it gets a bit steamy, and I will have 3 very grumpy children if I don't sort out heating before the weather turns. Is there anything I should try myself, or should I just take it to a garage? Thanks.x