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The Bard 800-0085 cap tube assembly is an OEM refrigerant metering component used in select Bard wall mounted air conditioners and heat pumps to regulate refrigerant flow into the evaporator for stable cooling performance. When a cap tube becomes restricted, damaged, or leaks, it can lead to poor capacity, icing, or improper system pressures, so replacing it with the correct factory assembly helps restore proper operation and maintain the unit’s original design charge and metering characteristics. Because this part is specific to certain model and serial ranges, match Bard 800-0085 to your unit’s parts list before ordering and have installation performed by a qualified technician due to refrigerant handling requirements.