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Bard part number C8105-056-0104 is a programmed motor control module service part used in select Bard wall-mounted HVAC equipment to manage ECM blower motor operation and staging based on incoming control signals. When this module fails, you may see blower operation issues such as incorrect speeds, intermittent airflow, nuisance shutdowns, or a unit that will not respond properly to calls for heating or cooling. Replacing C8105-056-0104 with the correct Bard OEM programmed module helps restore factory-intended motor control logic and dependable airflow performance, which is critical for comfort, dehumidification, and overall system reliability. Confirm compatibility by matching the full part number to your unit model and serial information before ordering.