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Bard part number 5051-126BX is an OEM boxed condenser coil service replacement used in Bard wall mount packaged air conditioners to reject heat at the outdoor section of the unit and restore proper cooling capacity when the original coil is leaking, restricted, or physically damaged. Replacing the condenser coil helps protect the compressor from high head pressure issues caused by poor airflow or reduced heat transfer, and using the correct Bard factory coil keeps refrigerant circuit connections and coil fit aligned with the original design. Confirm compatibility by matching the unit model and serial number to the Bard parts list before ordering, since condenser coils are model specific and changes can occur across revisions.
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.