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Bard 1804-0286 Low Pressure Control Assy is an OEM pressure safety control used on Bard wall mount air conditioners and heat pumps to monitor the refrigerant suction side and protect the system during loss-of-charge conditions or airflow problems that can drive suction pressure too low. When the pressure drops out of range, this control helps interrupt operation to prevent compressor damage and nuisance freeze-ups, then allows normal operation again once conditions recover. Because low pressure controls can vary by cut-in/cut-out settings and connection style across model families, confirm your unit model and serial number and match the existing control assembly before ordering to ensure proper fit and correct system protection.