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Bard part 8604-143BX is an OEM electric heat strip rated 5.0 kW at 240V with a two terminal connection, used to provide supplemental or emergency electric heat in compatible Bard wall mount and packaged HVAC equipment. If your unit is blowing cool air in heat mode or the electric heat will not energize, replacing a failed heat strip with the correct Bard kit helps restore proper heat output and safe, factory intended operation. Confirm voltage and heater kW requirements on the unit data label and match the existing heater kit style and wiring before ordering, since heater kits are model and configuration specific and are typically installed as a complete assembly.
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.