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Bard 8402-068 is an OEM limit control switch used in Bard gas-fired furnace applications to help protect the heat exchanger and surrounding components by responding to elevated plenum temperatures and automatically resetting once temperatures return to a safe range. This style of temperature safety control uses a 7 inch sensing element with a standoff configuration to place the sensor correctly in the airstream, making proper fit and insertion depth critical for reliable cycling and nuisance-trip prevention. If your unit is short cycling on limit or locking out on high temperature, replacing the limit control with the correct Bard part number is a smart first step, but always verify the furnace model and installation details against the Bard parts list before ordering.
* Orders less than $50 may incure a minimum order fee.