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Carrier 38YCS048 Expansion Valve
A split-system AC unit would not produce cooled air if it was deprived of a functioning expansion valve. Your home AC system contains an expansion valve that lets the coolant to expand into its regular gaseous form from a liquid.
Some warnings of a declining main expansion valve
- Air from the AC is definitely not as cold as you are accustomed to coming out of the vents
- The outdoor AC unit takes forever to cool the indoors
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