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Panasonic CS-KS18NB4UW Expansion Valve
Your home AC system contains an expansion valve that lets the coolant to expand back to its low-pressure gas form from a high-pressure liquid form. Your main AC unit could not emit cold air without a properly functioning valve.
Warnings to watch for in a failing expansion valve
- Your AC unit takes a really long time in its bid to cool as it should
- Cold air is definitely not as cold as you are accustomed to so as to feel comfortable in the house
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