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Carrier 58STA09010014 Expansion Valve
Pretty much every air conditioning system has an expansion valve that lets the coolant to expand into its regular vapor state from a high-pressure liquid form. An air conditioning system could not run without a properly functioning valve.
Indications your refrigerant expansion valve is dead
- The air conditioned air is much warmer than it ought to be comes through the ducts
- The cooling system takes a long time in a bid to cool all the rooms in your house
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