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The Bard 8301-014BX Discharge Air Sensor (boxed) is an OEM temperature sensing component used to monitor discharge or supply air temperature so the unit controls can regulate compressor and fan operation correctly. A failing discharge air sensor can cause nuisance lockouts, unstable temperature control, or improper staging, so replacing it with the correct Bard part helps restore accurate feedback to the control board and protect the system during changing load conditions. Use the part number on your existing sensor and confirm compatibility with your Bard wall mount or packaged unit model before ordering, since sensor types and harness connections can vary by series.
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.