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Bard part number 8402-098 is a 200 degree one shot limit control used as a safety temperature cutout in Bard HVAC equipment. When abnormal heat is detected, this OEM limit opens the circuit to help protect key components and reduce the risk of heat damage, and because it is a one shot style it is intended to be replaced after it trips rather than reset. This is the correct choice when a Bard service manual or parts list calls for a 200 degree one shot limit, and it is best practice to confirm the exact match by part number and the unit model and serial before ordering since limit controls are temperature and application specific.