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The Bard S8402-069 is an OEM automatic limit control used as a temperature safety switch in Bard wall mounted HVAC equipment, helping protect the system by opening its contacts when temperature rises to the limit and automatically resetting as the unit cools. This 2 pole limit control is commonly referenced with an open setting of 150 F and a reset at 125 F, making it a direct fit choice when you need to restore proper high temperature protection and dependable heater operation. Match the part number exactly and confirm wiring and mounting style to your unit model and parts list before installation, since Bard has also cross referenced this control to newer numbers in some catalogs.