What does THIS sound mean?

[SHO307]

This has been going on for about 2-3 years. I brought it up to the local Ford dealer; they said it wasn't anything
important. But in the last six months, it's been getting louder. The sound is originating from the little vent that you see in the video; it's somewhere under the dash.

EDIT: Can't upload the video...system says it's too big. The noise is a grinding sound from the little vent right by the ignition button.

 

[Raging Bull]

Not sure of the technical name but I think it controls the auto temp sensor inside the car. I think there is little fan in there. Gently blow some compressed air in there probably full of dust. Put a light up to it see if it is dusted over.

 

[SHOdded]

^^^ agree

 

[Mr.ShoFast]

I was hearing that noise also and noticed a ton of dust in there. Used a vacuum cleaner and sucked it all out. Looks like that’s used to measure the ambient temperature inside the car.

 

[SM105K]

It is affectionately called the "bacon dispensor" and it does measure cabin temperate.