Can someone give me a bit of advise please (and in the simplest terms too as I dont have a clue about cars). About 4 weeks ago my car started blowing out blasts of cold air when I had the air on hot. Then bout two weeks ago the hot air went completely and now I have only cold air coming out. Last night when I was driving for about half an hour the red light above the temp gauge symbol came on for bout 5-10 mins and then went off. The same thing happened on my return journey. I have a fiat Punto 1997. Hoping its something simple and straightforward as I cant really afford the garages fees. If anyone has any idea it would be much appreciated. thanks.