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Trane PTHD090 Expansion Valve
The AC in a split system cannot possibly cool the house if the valve was not present Your home AC system contains an expansion valve that allows the coolant to expand back to its low-pressure vaporous form from a high pressure liquid state.
Easy warnings your refrigerant expansion valve is going out
- The air conditioned air is not cold enough as you are accustomed to in order to feel comfortable
- The air conditioner takes a long time to keep the temperature down
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