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The Bard 910-2020BX Overflow Sensor Assy is an OEM condensate overflow safety device used on select Bard wall mount air conditioners and heat pumps to monitor the drain system and help protect the building from water damage. When condensate backs up or the drain pan level rises abnormally, this sensor assembly is designed to signal the unit controls for a protective response such as disabling cooling or calling for service, depending on the equipment configuration. As a genuine Bard replacement part, 910-2020BX is the right choice when you are troubleshooting nuisance shutoffs, overflow-related fault conditions, or replacing a failed or damaged sensor during drain maintenance.
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.