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Carrier CRBTMPWR003A01 Expansion Valve
Almost all AC systems have an expansion valve that makes it easier for the refrigerant to expand back to its low-pressure vapor state from its highly pressured liquid form. Your main AC unit would probably blow heated air if the valve was worn out.
Important signs your refrigerant expansion valve is failing
- Cold air is not as cold as you are accustomed to blowing from the vents
- Your cooling system takes a really long time in attempting to keep things cool
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