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Bard part number 8301-098-004ABX is an OEM UPC3 C2 Multi-Tec control used on Bard wall-mount HVAC equipment to manage unit operation and system functions through the factory control platform. This boxed controller assembly is intended for service replacement when the original control has failed, been damaged, or requires an exact like-for-like swap to restore proper staging, safeties, and communication features used in Multi-Tec applications. As with any Bard controls repair, confirm the unit model and existing controller revision before ordering, and move over any required field wiring, sensors, and accessories per the Bard service documentation for your specific configuration.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.