fan control does not work for air/heat system. using the heat setting, air gets warm but does not blow because the fan control does not work. the fan control where you turn up/down the speed does not operate at all. No air blows. like having no air/heat in the car. Dealership will not fix because it is out of warranty even though I took car in for service for exact problem and dealership could not replicate so no repair made when it was within warranty. Now dealership refuses to help. So I need your help. Any possible repair solutions?