Blower motor and blower resistor / Cabin filter
I researched the fixes, but because of my engineering background, I though of the cabin filter being clogged creating a high pressure differential. This requires more power and the blower motor resistor won't allow the fan to turn on. Check, clean or replace the filter and see if it fixes your problem before you spend the time and money on replacing the blower and or blower resistor. It worked for me!!!!