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The Bard 8602-023BX thermistor sensor is an OEM temperature sensing component used by Bard HVAC controls to monitor system temperatures and feed accurate readings back to the unit for proper staging, protection logic, and stable heating and cooling performance. If you are troubleshooting temperature-related faults, erratic operation, or sensor out-of-range codes, replacing a failed thermistor with the correct Bard part helps restore reliable feedback to the control board and keeps your wall-mount unit operating to factory specifications. Confirm application by matching the part number to your Bard model and serial, since thermistors can look similar but use different resistance curves and connectors.
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.