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Bard part number S912-0046 is an OEM fan and limit assembly used in Bard heating equipment to manage blower fan operation and provide high temperature limit protection during heat cycles. This control helps bring the indoor blower on at the right time, shut it off after the heat exchanger cools, and open the limit circuit if temperatures rise beyond safe operating range, which can prevent nuisance shutdowns and overheating damage when the correct OEM part is installed. Because fan and limit controls can vary by temperature settings and insertion length depending on the furnace and cabinet design, confirm S912-0046 against your Bard model and serial number parts list before ordering to ensure proper fit and safe operation.