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Bard part number 8402-061 is an OEM limit control used to help protect Bard HVAC equipment by opening the circuit when an unsafe temperature condition is reached, helping prevent overheating and nuisance damage in the heating control sequence. This type of safety limit is commonly tied into the heater package and control wiring so the unit can shut down heat until conditions return to normal. If you are troubleshooting repeated limit trips, a no-heat condition, or intermittent shutdowns, replacing the limit control with the correct Bard 8402-061 ensures proper fit, wiring compatibility, and reliable safety operation per the original unit design. Always confirm the exact unit model and serial number to verify the correct limit rating and application before ordering.