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Carrier 50XP048300 Expansion Valve
Almost all AC systems have an expansion valve that makes it easier for the refrigerant to expand back into its natural vapor form from a liquid. Any air conditioner would most likely give you heated air if the valve was missing.
Some warnings the expansion valve is going out
- The cool flow of air is warmer than it really should be exiting the vents
- AC takes a really long time to comfortably cool all the rooms in your house
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