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Bard part number 905-0298 is an OEM expansion valve assembly used in Bard wall mounted packaged air conditioners to meter refrigerant into the evaporator coil and help maintain stable superheat for reliable cooling performance. A properly functioning valve supports correct coil feeding and efficient heat transfer, which can reduce common symptoms like poor capacity, coil icing, or erratic suction pressure when the rest of the refrigeration circuit is in good condition. Because expansion valves are application specific, confirm the exact Bard model and serial number and match the original part number before ordering to ensure proper fit and correct system operation.