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Bard part 8402-152 is an OEM limit control line break used as a safety temperature control in Bard wall-mounted HVAC equipment, commonly applied where a line break limit control is specified for the L150 to L180 range. When abnormal heat conditions occur, this control is designed to interrupt the electrical circuit to help protect critical components and prevent overheating related damage. If you are troubleshooting a unit that is cycling off on limit or showing a heat related safety fault, replacing the correct Bard 8402-152 control helps restore proper safety operation and reliable run time, but always verify the cutout and reset requirements against your unit wiring diagram and parts list before ordering.