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Bard part number 8301-096-004BBX is a factory-programmed UPC3 Core 2 control board supplied boxed, intended to restore proper unit operation when a failed or corrupted controller is causing lockouts, communication issues, or inconsistent staging. As an OEM Bard control component, it is designed to manage core system functions such as safety monitoring, operating modes, and service diagnostics on compatible Bard wall-mounted HVAC equipment, helping technicians return the unit to its intended sequence of operation without field programming. Verify compatibility by matching the full part number and checking your unit model and control board revision in the Bard service literature before ordering, since UPC3 variants are not always interchangeable.