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The Bard 800-0189BX Cooling Cap Tube Assy - Boxed is an OEM refrigerant metering assembly used in Bard wall mounted air conditioners to regulate refrigerant flow into the evaporator during cooling operation. A properly sized capillary tube is critical for maintaining correct pressures and stable cooling performance, so replacing a restricted or damaged tube set helps address poor cooling, coil icing, or erratic system operation after a sealed system repair. Because this is a factory Bard part, it is built to match the original flow characteristics and connection style for reliable fit and dependable service when installed by a qualified HVAC technician.
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.