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The Bard 8201-124BX 0-10V blower control board (box) is an OEM replacement control used in Bard wall-mounted HVAC equipment to modulate blower operation based on a 0-10V input signal, helping the unit maintain proper airflow for heating, cooling, and ventilation modes. This board is typically replaced when the blower no longer responds correctly to the control signal, runs at the wrong speed, or causes intermittent airflow issues. Part 8201-124BX is listed as the direct replacement for earlier 8201-124, so it is a smart choice when you need the correct Bard-specified control for reliable fit and system performance.
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.