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Bard part number S8402-092 is an OEM thermal cutoff (G5AM0400104) used as a non resettable safety device in Bard HVAC equipment to open the circuit if abnormal heat conditions occur. When this thermal cutoff trips, the unit will not operate correctly until the failed cutoff is replaced, so it is commonly sourced during overheat or airflow related service calls to restore proper safety protection and normal system operation. Match this part number to your unit documentation and the failed component markings to confirm correct temperature rating and lead configuration before ordering.