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The Bard 905-0441 Filter/Expansion Valve Assy is an OEM refrigerant metering component used in select Bard wall mounted packaged air conditioner systems to control refrigerant flow into the evaporator coil for stable cooling performance. Replacing a restricted or malfunctioning expansion valve assembly can help correct issues like poor cooling, coil icing, or erratic superheat, and using the correct Bard factory part helps ensure proper fit with the unit’s refrigerant circuit and sensing arrangement. Because application varies by model and vintage, match Bard 905-0441 to your unit’s complete model and serial number and follow Bard service procedures for evacuation, dehydration, and leak checking after installation.