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The Bard 8620-248 TXV Upgrade Kit is an OEM thermostatic expansion valve upgrade package used to restore proper refrigerant metering and stable evaporator superheat in compatible Bard wall-mount air conditioners and heat pumps. When a system is hunting, underfeeding, icing, or showing inconsistent suction pressure, a correct Bard-approved TXV upgrade can help bring operation back in line with factory performance expectations. Because TXV selection and installation details vary by model and refrigerant circuit, confirm unit model and serial information against the appropriate Bard service literature before ordering and follow standard refrigeration practices when replacing the valve and re-commissioning the system.