the electronic movement inside, and the air hitting metel
Because a vent is closing. Its the fresh air intake closing.
This is caused by a blown capacitor. The electrolyte in the capacitor is boiling, and the capacitor has opened to vent the excess pressure. You will need to purchase a new power supply or have a computer technician do it for you.
My car was doing the same thing but in mine, a dried leaf had made its way into the vent and was making the noise. Make sure the vent area is clear.
I have heard that if you have papers or napkins in the glove compartment box they can get sucked into the air vent which then makes a humming noise that you can hear while driving and as you increase the speed the pitch of the noise gets louder.
Air hole open=steadyAir hole closed= not steady.Why?Lack of oxygen makes the flame unsteady when the hole is closed as oxygen is used for burning.
There is a little knob in the girls room that controls the vent
A volcano is caused by the build up of molten rock (magma) beneath the earths surface. It forces up through the vent of a volcano, and as it forces up it breaks through the rock, which is the noise that is made. Imagine a shaken up coke bottle,: when you open it the coke comes out with a noise, because of the pressure it was under as it is forced out.
One way to reduce the vibration from wind noise on a stove vent is to make sure that the vent pipe has a screen over it on the roof. Some might have a screen and others might have a small roof like vent over it. It is not good to completely block this pipe, so a little rattle now and then might still be heard on windy days.
if its the clicking I'm thinking of its the actuator for the vent door. try shutting off everything off in the heater/a/c system for a couple of minutes and then turn it back on. that usually stops it for me.
was there something on your dash that fell in the vent, a bad fan will make noise all the time.
add a 10 foot piece of flex duct
Vent door gear is stripped. It is found under the passenger side dash. Remove glove box to get a good view of heater box . You will be able to locate which one is bad ( there are two vent controllers), by listening to them while trying to turn on you a/c. A cheap fix is to unplug the one making noise and shim the vent open. Hope this helped.