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Bard part 5650-045 is an OEM 3-way reversing valve with 1/2 inch by 1/2 inch connections used in Bard heat pump refrigeration circuits to shift refrigerant flow between heating and cooling operation. When a system has a stuck valve, internal bypass, or intermittent changeover, replacing the valve with the correct Bard-listed component helps restore proper mode switching and stable capacity. Always confirm application by matching the exact Bard part number and verifying coil voltage and tubing connection sizes against your unit documentation before ordering, since Bard lists updated service replacements for this valve family.