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Bard 8402-225BX is an OEM limit control (L170-8.0) used as a safety temperature switch in Bard wall-mount HVAC equipment to help prevent overheating by opening the circuit at its specified cutout temperature and allowing the system to return to normal once conditions are safe. This factory-correct control is commonly applied in heating and electric heat sections where accurate temperature limiting is critical for safe operation and nuisance-trip reduction. If you are troubleshooting repeated high-limit trips, verify airflow and heat kit condition, then match the original limit rating and mounting style to ensure proper fit and reliable protection when replacing Bard 8402-225BX.
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.