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Bard part 5651-105BX is an OEM expansion valve with 3/8 in x 3/8 in connections, used to meter refrigerant into the evaporator in compatible Bard wall-mount and packaged HVAC equipment. When the valve is worn, stuck, or leaking, system performance can suffer from poor cooling, erratic suction pressure, icing, or improper superheat. Replacing it with the correct Bard OEM valve helps restore proper refrigerant control and reliable operation, but fit and application vary by model and refrigerant, so confirm your unit model and serial number and match the connection style before ordering.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.