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Bard part number 8402-145 is an OEM automatic-reset limit switch used as a temperature safety control in Bard HVAC equipment. Rated L230-30 and commonly identified as a green, exposed-face style limit, it is designed to open the circuit at an overtemperature condition and then automatically reset after the temperature drops, helping protect heaters and critical components from heat-related damage. This part is selected for correct temperature rating and fit on the intended Bard model, so confirm your unit model and existing limit specs before ordering to ensure proper safety operation and reliable system performance.