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Bard part number 905-0185 is an OEM expansion valve assembly used in select Bard wall mounted air conditioners and heat pump units to meter refrigerant into the evaporator coil based on load, helping maintain proper superheat and stable system performance. Replacing a restricted or failing expansion valve with the correct Bard 905-0185 assembly can address symptoms like poor cooling, coil icing, low capacity, or nuisance trips caused by improper refrigerant feed. Because valve sizing and connections vary by model and refrigerant circuit, confirm unit model and serial information against the Bard parts list before ordering to ensure correct fit and operation.