2005 is ac controller scream?
Recently on my 05 is 300 the ac fan has been randomly dropping to low (I always run in auto mode) and then back to whatever speed it was at. I didn't think much of it until today, when I got in the car and heard the worst high pitch noise. At first I thought it was coming thru the radio so I checked the antenna wires. At that point I discovered it was actually either the fan it's self or the controller unit. Attached is a video of the car making the sound. I wasnted to get some input before I just start replacing components. Pretty sure the controller is dying. What do you think?