Climate control issue
 

I have searched and have been uanble to find helpful info so i will ask the forum. I was driving down the interstate with the defroster on high. suddenly i smelled burning wire insulation and the defroster shut off. i waited ten min and tried to turn it on and it works fine. Now today the blower will not kick on on the 5th notch(high) for anything from defroster to heater. any advice on where to start looking for diagnosis.