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The Bard 904-0681BX Pre-Cond. Valve Assembly (boxed) is an OEM refrigerant control component used in Bard wall-mounted air conditioner systems to regulate refrigerant flow during specific operating conditions, helping the unit maintain stable performance and protect key refrigeration components. As a factory Bard valve assembly, it is built for proper fit and dependable sealing where aftermarket substitutions can create nuisance faults or repeat leaks. Confirm compatibility by matching your unit model and serial number to the correct parts manual before ordering, since valve assemblies can vary by refrigerant type and unit vintage, and are often tied to specific configurations.
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.