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The Bard 910-2100 Econ Control Board Assembly is an OEM electrical control used in Bard equipment to manage economizer related operation, coordinating inputs and outputs that help the unit respond correctly when the economizer is enabled. Replacing a failed economizer control board can restore proper ventilation and cooling logic, prevent nuisance faults, and bring the system back to expected performance on compatible Bard wall mounted HVAC models. Because control boards can vary by unit series and revision, confirm the part number and connector style against your Bard wiring diagram or service literature before ordering to ensure proper fit and correct system operation.