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Bard 8402-031BX is an OEM temperature limit control (limit switch) used in Bard HVAC equipment to help protect the unit from overheating by opening the control circuit at 155°F and allowing operation again as temperature drops to 130°F. This safety control is commonly used in the unit’s heat section or supply air safety chain, and replacing a weak or nuisance-tripping limit with the correct Bard-specified part helps restore proper shutdown protection and reliable operation. Confirm your model’s parts list and wiring before ordering, since similar-looking limits can differ in temperature ratings and mounting style.
* Orders less than $50 may incure a minimum order fee.
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.