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Bard 800-0274 is an OEM TXV assembly used in Bard wall-mounted air conditioners and heat pumps to meter refrigerant into the evaporator based on load, helping the system maintain stable superheat and efficient cooling performance. A properly operating TXV can reduce symptoms like coil icing, poor capacity, and erratic suction pressure when the rest of the refrigeration circuit is in good condition. This factory-correct assembly is built to match Bard fit and connection requirements, making it a dependable choice when replacing a restricted, leaking, or sticking expansion valve during sealed-system service.