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The Bard 921-0037BX Blade Switch Assembly is an OEM electrical switching component used in select Bard wall mounted HVAC equipment to provide dependable on off switching as part of the unit control and safety circuit. When a worn or intermittent switch causes nuisance shutdowns or prevents the unit from running, replacing it with the correct Bard factory part helps restore proper electrical continuity and reliable operation with the wiring and mounting expected for the original equipment. Verify compatibility by matching the full part number and referencing your unit model and serial information 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.