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The Bard 905-0632 TXV Assembly is an OEM thermal expansion valve assembly used in Bard wall mounted HVAC equipment to meter refrigerant flow into the evaporator and maintain proper superheat for stable cooling performance. A failing or restricted TXV can show up as poor capacity, erratic suction pressure, or coil freeze ups, so replacing it with the correct Bard factory part helps restore designed refrigerant control and protects the compressor. Because TXVs are application specific by tonnage and refrigerant circuit design, confirm the exact unit model and serial compatibility in the Bard service parts list before ordering and follow proper refrigeration practices during installation including evacuation and correct charge.