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Bard 8301-068-001B is an OEM UPC3 control board used in Bard MULTI-TEC wall-mount air conditioner applications, providing the unit level logic needed to coordinate key operating functions and system calls. If your MULTI-TEC unit is experiencing control related faults, erratic staging, or communication issues within a connected system, replacing the control module with the correct Bard board is often the right fix to restore proper operation and compatibility. Match the full part number 8301-068-001B to your equipment literature to confirm the correct UPC3 revision for your specific MULTI-TEC configuration before ordering.