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Bard 135-400BX is an OEM field wire channel (boxed) used in Bard Q-TEC wall-mount HVAC units to route and protect incoming power and control wiring as it transitions into the electrical/control compartment, helping keep wiring organized, supported, and away from moving or hot components. When a unit has been serviced multiple times or experienced vibration damage, replacing a bent or missing wire channel is a practical way to restore proper wire management and reduce the chance of chafing or pinched conductors. Verify fit by matching your unit model and serial information to the correct parts breakdown, since this component is used across multiple Q-TEC configurations.
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.