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The Bard 905-0626 Cooling TXV Assembly is an OEM thermostatic expansion valve assembly used in Bard wall mounted air conditioners to meter refrigerant into the evaporator coil and maintain proper superheat for stable, efficient cooling. When a TXV starts sticking or drifting out of control, you can see symptoms like poor capacity, coil icing, erratic suction pressure, or nuisance trips, and replacing the valve assembly with the correct Bard part helps restore factory designed refrigerant control and protects the compressor from floodback. For best fit and performance, confirm the part number against your unit model and serial, and have a qualified technician follow proper refrigeration service practices during installation.