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The Bard 8605-021BX crankcase heater is an OEM wraparound compressor heater used on select Bard wall mount and packaged HVAC units to keep the compressor crankcase warm during off cycles and low ambient operation, helping reduce refrigerant migration into the oil and supporting smoother, more reliable starts. This band style heater installs around the compressor body and is typically energized when the compressor is off, so correct voltage and application match are important. As with any Bard OEM electrical component, confirm the unit model and serial compatibility in the Bard parts list or service manual before ordering to ensure proper fit and safe operation.
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.