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Bard part 8402-096 is an OEM thermal cutoff (G5AM0400117) used as a temperature safety device in Bard wall mounted HVAC equipment. When abnormal heat builds up, this cutoff opens the circuit to help protect critical components and reduce the risk of overheating related damage or nuisance trips. It is a straightforward replacement for failed or weak thermal protection devices during service, but match the temperature rating and installation location to your unit’s wiring diagram or parts list to ensure proper operation and fit.