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The Bard 8602-056-0002BX Programmed Econ Module-Service is an OEM economizer control module used in compatible Bard wall-mount HVAC systems to manage economizer operation and help the unit make proper use of suitable outdoor air when conditions allow. As a programmed service module, it is intended to restore correct economizer logic and reliable damper control when troubleshooting points to a failed or incorrect controller, helping prevent nuisance lockouts and inconsistent ventilation performance. Match the part number on your existing module and verify unit model and economizer configuration before ordering, since programmed boards are application-specific.
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.