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The Bard 1804-0107BX is an OEM A/R low pressure control assembly used in Bard wall-mounted air conditioners and heat pump package units to monitor refrigerant suction pressure and protect the refrigeration circuit during low charge, airflow restrictions, or low outdoor ambient conditions. As an auto-reset safety control, it helps keep the system from running outside safe operating limits and can prevent repeated nuisance trips when conditions return to normal. When replacing this control, match it to the exact unit model and serial range and verify the cutout and reset behavior specified in the Bard service literature so the compressor and controls operate as intended.
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.