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The Bard 8402-183BX is an OEM L190-40 limit control supplied boxed for service work, used as a temperature safety switch in Bard HVAC equipment to help prevent overheating conditions. When the sensed temperature reaches its set point, this control opens the circuit to shut down the heat or equipment operation until temperatures drop to a safe level (based on the control design in the unit), helping protect key components and improve system reliability. This is a genuine Bard replacement part intended to match factory wiring and mounting locations, so it is a solid choice when troubleshooting nuisance trips, heat shutdowns, or confirmed limit failures. Verify the exact part number and temperature rating against your Bard model and parts list before ordering.
* Orders less than $50 may incure a minimum order fee.
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.