Question about Heating & Cooling
What you are hearing is the refrigerant going through the expansion valve...sometimes they will squeal as the pressure builds...depending on the valve the refrigerant has to push open a check valve and that will cause a noise...
The noise does not mean that you have a problem, and it will not hurt anything... nothing is broken, it just can be annoying...
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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