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Bard 800-0478BX is an OEM orifice assembly supplied boxed for service replacement in Bard wall-mounted air conditioners and heat pumps. The orifice is a key metering component that helps regulate refrigerant flow so the system can maintain proper pressures, stable superheat, and consistent cooling performance. Replacing a restricted, damaged, or incorrect orifice can resolve symptoms like poor capacity, abnormal suction pressure, or coil icing when the rest of the refrigeration circuit is in good condition. To ensure correct fit and operation, match the part number to your unit model and serial and confirm the specified orifice size for the application before installation.
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.