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Bard part number 8106-072-0077BX is an OEM programmed motor supplied boxed for service replacement in Bard wall mounted HVAC equipment where the motor speed and operation are matched to the unit controls. A programmed motor is not a generic swap, so using the correct Bard motor helps restore proper airflow and stable operation without nuisance issues from mismatched programming or incorrect performance. Confirm your unit model and serial number compatibility before ordering, and if you are replacing a failed motor, inspect the blower wheel and wiring harness connections to avoid repeat failures after 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.