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The Bard 8402-215BX limit control is an OEM temperature safety control used in Bard wall mount HVAC equipment to monitor system temperature and help protect the unit from overheating. When temperatures reach the control’s setpoint, it opens the circuit to interrupt operation, supporting safe, reliable heating performance and reducing nuisance shutdowns caused by incorrect aftermarket substitutions. This boxed Bard replacement part is intended to match original fit and wiring connections, so the best practice is to confirm the exact part number from your unit’s model and serial tag or the Bard service literature before ordering.
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.