What Causes a Staccato Rattling Noise in Central Air Systems?

  • Thread starter DaveC426913
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DaveC426913
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So I've discovered I have an aural trigger that keeps me awake at night.

This is the first time I've lived in a house with central air. When the air comes on, the air register in my bedroom emits a faint rattle from somewhere down in the bowels of my central air system. A rattle that sounds exactly like the staccato ticketyticketytick that an oldey-timey hard drive makes when it's thrashing*.

*thrashing occurs when a computer tries to load a software program that's larger than the RAM, and has to dump part of its memory back to temporary disk storage, and then gets stuck in a loop.

Imagine a dude trying to bring three large cases of soda pop indoors from the car. He puts the Cola under one arm and the 7UP under the other arm, but then sees the Root Beer still in his trunk. He has to put down the 7UP to pick up the Root Beer, but then he looks down to sees the 7UP in the trunk. He has to put down the Cola to pick up the 7UP. Imagine him doing this forever (because he fails Turing's Halting Problem).

So I just lie awake, while my autonomic nervous system alternates 60 times a second between hit the off switch! and wait just ooooone more minute! and Is this it then? Have I lost everything on my drive?
 
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Can you fix the noise?
It should be something simple in the air handler or return grille.
 
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