Audi A3 Heating Fan Problem

[Sauchen]

I have a problem with the internal heating fan in my 2007 Audi A3. The fan does not run when the dash selector switch is in positions I, II or III. The fan only runs at maximum speed when the selector switch is in position IIII. The car has the basic AC, not climate control.

Any advice how the fan speed speed selector function works and where the problem might be would be appreciated

[SteBrown91]

In don't know about Audi's specifically but on other cars its usually the resistor for the fan on the back of the heater panel. You can either replace the resistor or replace the heater controls