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International Comfort Products NDN3075HFA1 Expansion Valve
Pretty much every air conditioning system has an expansion valve that allows the coolant to expand back into vapor form from a high pressure liquid state. Your main AC unit would be broken if the expansion valve was worn out.
Important signs the expansion valve is dying
- The air conditioned flow is warmer than it ought to be coming into the house
- AC takes way too long to keep the home at a comfortably cold temperature
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