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Bard 800-0378BX is an OEM heating distributor assembly (boxed) used in Bard wall-mount heat pump systems to split and meter refrigerant evenly through the coil circuit during heating operation, helping prevent uneven coil feeding that can reduce capacity and cause performance issues. When a distributor is restricted or damaged, you may see poor heating performance, abnormal pressures, or uneven frost patterns, so replacing it with the correct Bard factory part helps restore designed refrigerant flow and reliability. Confirm compatibility by matching the full part number and verifying against your unit model and parts list before ordering, since distributor configurations can vary by series and coil design.
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.