Why is my heating not working?

I own a 1998 Renault Laguna RT 2.0 (1998cc) petrol car. Have been using it fine and then all of a sudden, my heater blower does not work!
I have checked the fuses, pulled the dash out to get behind the motor blower itself and no problems there, behind passenger glove box to look to see if any problems was behind there with the heating and saw nothing out of the ordinary. Checked under the bonnet to see if the water levels where the problem and it was not.
I am just coming to an end of what it can be...? any suggestions?

Need more info about the car just ask...

Chris - Personal trainer/ Sports Massage Therapist
January 2011