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The Bard 8602-056-0003BX Programmed Econ Module - Boxed is an OEM economizer control module used in select Bard wall mounted HVAC units to manage outdoor air economizer operation and maintain proper ventilation and free cooling performance when conditions allow. Replacing a failed or incorrect module helps restore reliable economizer sequencing, reduces nuisance faults, and supports correct interaction with related economizer components such as sensors, actuators, and wiring harness connections. Because economizer modules are application specific, match the part number 8602-056-0003BX to your unit model and serial information or the Bard parts list before ordering to ensure proper fit and programming.
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.