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Horrible whistling noise when air conditioner is on

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This is common when the duct work is smaller than the volume of air going through it can take, due to trying to pull a lot of volume of air through a straw. It makes a whistle sound. Any true A.C. tech. can tell you the same thing. The volume of air is as similar as water being pushed through a smaller area, the "volume" of water will try to travel faster to get to it`s final destination. So is the "volume of air" traveling through a smaller duct to get to the blower in the furnace, making the whistling sound. Call a A.C. tech and ask them if there is anything you can do to stop this from happening.

Posted on May 16, 2013

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Sounds like a bad motor to me. You would need to investigate as I am not there. Doubt it is worth fixing.

Posted on Aug 20, 2010

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SOURCE: I have a danby premiere r410a air conditioner & it

This could be because there is a small seam in the connection of the ducts. Or it can be the air volume is traveling through a smaller duct to get to the blower in the furnace. You should call an air conditioning technician and ask them if there is anything you can do to stop this from happening. One option is to buy some duct seal and paint it.

Posted on Jul 04, 2013

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