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Bard 8301-068-002D is an OEM UPC3 controller board used in Bard FUSION-TEC wall-mount air conditioner systems, serving as the primary control for unit operation and communicating with related system components for proper staging and monitoring. If your unit is experiencing control faults, loss of communication, or erratic operation, replacing the UPC3 with the correct Bard-programmed board helps restore factory logic and reliable performance. Because this assembly is software-revision specific, confirm compatibility by matching the full part number and reference the unit documentation before ordering, especially on FUSION-TEC HR-series equipment where the UPC3 is called out on the control panel parts list.