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Bard part number 8301-098-001BX is an OEM programmed UPC3 C2 controller used on select Bard wall mount HVAC applications to manage unit operation and protect proper sequencing of key functions. Because this is a programmed control, correct fit depends on the exact Bard model and control revision; matching the unit nameplate information and the control requirements in the Bard service literature helps prevent communication and setup issues during replacement. It is a direct replacement control component intended to restore reliable system logic and normal operation when the original controller is damaged, fails, or becomes unreliable.