Air Conditioner Making Very Loud Popping Sound.
okay, so I have no idea about air conditioning or how it works, and I dont know any of the technical terms, so I'll do my best with pictures. So in the hallway is where the air is flows in: I open the grill, and I took out the air filter: http://img164.imageshack.us/my.php?i...mg00197qf4.jpg notice the big hole. there is also a 'smaller hole' on the bottom(see the small hole and notice that it is closed). http://img389.imageshack.us/my.php?i...mg00196th1.jpg closer view of the 'small hole' http://img389.imageshack.us/my.php?i...mg00194bh9.jpg from what I gathered. When the A/C is turned on, or when our air cycler activates, the small hole starts to open up. It open up halfway(I imagine to let air in). It opens up halfway(maybe less) and then closes quickly, making a fairly loud popping/thumping sound. why is it doing that all of a sudden? whats wrong? what do I do to fix it?
Answer:
It looks like a fresh air intake. I've never seen one plumbed in to the filter/cold air return. Is it accessable from the back side? You should see that small duct going outside. And on the damper, you will find a 24volt servo that opens it. Maybe the motor is not holding damper shaft, and is letting go of it half way through opening. The air being drawn by furnace would surely slam that thing shut. Anyway just a thought. Good luck, let us know what you find...