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Bard part number 1804-0287 is an OEM low pressure control assembly used on Bard wall mounted air conditioners and related packaged equipment to protect the refrigeration circuit during low suction pressure conditions. When system pressure drops due to issues like low charge, airflow restriction, coil icing, or a failed indoor blower, this control helps prevent compressor damage by interrupting operation until conditions return to a safe range. Replacing a weak or nuisance tripping low pressure control with the correct Bard OEM assembly helps restore dependable cycling, proper safety operation, and factory intended system performance; confirm part number compatibility against your unit model and serial before ordering.