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Bard part 905-0415 is an OEM heating expansion valve assembly used in Bard HVAC equipment to meter refrigerant flow for stable heating performance and proper superheat control. Replacing a worn or restricted expansion valve can help correct symptoms like poor heat output, coil icing, erratic pressures, or temperature swings, especially after a sealed system repair or contamination event. Because refrigerant metering devices are application specific, match 905-0415 to your unit model and serial and confirm refrigerant type and connections before ordering, then have installation and charging performed by a qualified technician to ensure correct system setup and reliability.