Is This Noise Normal?

[burrier777]

When I am in my AV at an idle I hear something like a door closing. Could it be the heater? Does anyone else have this sound? I have 900 miles on it and I haven't taken it off road yet.

 

[imaniguana]

If you are redirecting the climate control outlets, you might hear this. I hear it in mine too, when I do this.

 

[burrier777]

Thanks you so much for the info.