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Bard part 8402-117 is an OEM temperature limit control (L215-30) used as a high limit safety in Bard HVAC equipment, helping protect the unit from overheating by opening the circuit when the set temperature is reached and allowing normal operation to resume once temperatures drop. This control includes 3 inch standoffs to support proper mounting depth and consistent sensing location, which is important for correct cutout and reset performance. If you are replacing a failed or nuisance tripping limit, match the temperature rating and insertion depth to the original part and confirm wiring and mounting orientation per your Bard service literature to ensure safe, reliable operation.