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The Bard 8301-112-002BX is a factory OEM programmed UPC3 C2 controller supplied boxed, designed to restore proper unit staging, safety monitoring, and overall system logic on compatible Bard wall mount and related packaged equipment using the UPC3 platform. When a unit has nuisance lockouts, failed communication, or control faults tied to the main board, replacing with the correct pre-programmed controller helps ensure the equipment starts, runs, and protects itself the way Bard intended. Because control boards are application-specific, confirm the exact part number match to your unit model and serial before ordering, and transfer any required field wiring and settings per the Bard service documentation during installation.