Moved to the MkIII section for more looks from owners of this model.
Are you planning on heading in to your dealer to have this looked at? Please let me know, along with your mileage.I have a 2012 Focus S, and whenever I set the thermostat to "heat" (anywhere in the red area of the dial), I hear a whistling sound from the air vents. I've had this problem since day one, but I've just been ignoring it.
Does anyone know if this is an easy fix?