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The Bard 8402-228BX is an OEM limit control (L200-8.0) used as a temperature safety switch in Bard HVAC equipment, helping protect the system by opening or closing its control circuit when a set temperature limit is reached. In Bard wall-mount units, this type of control is commonly tied into the heating section safety chain to prevent overheating and nuisance shutdowns by ensuring the unit runs within its designed temperature range. If you are troubleshooting heat trips, intermittent operation, or a safety circuit that will not reset, replacing a weak or out-of-calibration limit with the correct Bard 8402-228BX helps restore proper safety operation and reliable heating performance. Verify your model and wiring configuration against the Bard unit wiring diagram or service manual 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.