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The Bard 800-0197 Cap Tube Assembly is an OEM refrigerant metering component used in Bard wall mount air conditioners to regulate refrigerant flow and maintain proper evaporator performance. If your unit is showing signs of improper cooling, unstable suction pressure, or icing that points to a restricted or damaged capillary tube circuit, replacing the metering assembly with the correct Bard part helps restore factory intended capacity and reliability. Because cap tube assemblies are application specific by model and refrigerant circuit, confirm 800-0197 against your unit model and serial information before ordering, and follow proper refrigerant handling practices during installation.