My 06 325I Does not blow air. on 2006 BMW 325i

I went ahead and replaced the blower motor and resistor and still nothing. The BMW dealership is now telling me that it can be IHKA control unit however, It does control all features and provides power to everything but the blower itself. Any suggestions or ideas? It worked over the winter months then all of a sudden nothing.

Asked by for the 2006 BMW 325i