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The Bard 8402-118BX is an OEM limit control (L160-7.0) used as a temperature safety switch in Bard HVAC equipment to help prevent overheating conditions during heat operation. Set up with a 160F cutout and a 7F differential, it opens the circuit if the temperature rises beyond its limit, then allows operation again once temperatures drop back to a safe range, helping protect electric heat components and surrounding wiring. If you are troubleshooting nuisance high limit trips or replacing a failed open limit, matching the correct setpoint and mounting style is critical, so confirm your unit model and original limit rating before ordering.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.