How to fix my heating in renault clio?

I have no heating in my renault clio, i have topped up the water in the radiator to the max level, but it still blows out cold air. I think it may be something to do with the thermostat but i don't know how to fix it, can anyone give me some advice as i want to do this myself as i can't afford a mechanic.
Sasha, November 2005


done
I have the same problem with my s reg clio, did you fix the problem, if yes could you please how.
thanks

nick, December 2007
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