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What causes a squealing sound to emanate from the entire length of the small warm line running from the indoor unit to the outdoor unit of a central AC system that otherwise seems to cool fine?
Wiki User
∙ 16y ago
Hi, Super high velocitys of liquid line refrigerant at in your system.
Several things can cause this.
My advice to you use it monitor the line closely and see exactly where the
sound is eminating from in that line.
If you do find a specific point for the noise origination then feel the line or use accurate temperature gauge to tell you if you have pressure drop at that point. You will know if the line temperature is suddenly cooler after the point of sound origination.
This clearly shows you have a restriction in flow in that area and refrigerant velocity is greatly amplified therefore causing your squeal.
Another thing to think about is that the whole line may be to small for the cooling load it is trying to handle.'
There are other things but these are the most likely. Hope this helps: Jimiwane
Wiki User
∙ 16y ago
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