I have a 2012 Mustang that has a high pitch blower fan noise(whine) that increases in sound as we turn the blower speed up. It doesn't do it all the time, some days you don't hear it at all, other days, it's there all day. Sometimes if you shut the car off for a few minutes the noise goes away. It's not in the radio as you can still hear it with the radio turned off.
Has anyone had this problem and if so, did you find a cure for it?