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Carrier 58MXA100F14116 Expansion Valve
Expansion valves are used in AC systems and allows the refrigerant to expand back to its low-pressure gas state from a high-pressure liquid form. Your AC would produce no cooled air if the valve was missing.
Main clues your main expansion valve has little life left
- AC air production is not as cold as it ought to be coming from the vents
- The outdoor AC unit takes forever in its effort to cool
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