Heater Not WorkingAt All

I got in my Renault Scenic 1998 1.9dti today and turned on the fan but nothing happened...it does not work on any of the 4 settings....the air con light comes on so no probs there...i have checked the fuses but am now at a loss...any help???? please??:banghead:
SORTED IT OUT NOW...IT WAS THE HEATER MOTOR...BIT OF A STRUGGLE TO GET IT OUT BUT GOT ONE FOR£45 FROM SCRAPPY.....SOME QUOTED ME UP TO £90....ONLY £156 NEW FROM RENAULT!!!!!