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The Bard 800-0086 expansion valve assembly is an OEM refrigerant metering component used in Bard wall mounted air conditioners and related packaged equipment to regulate refrigerant flow into the evaporator coil based on load. A properly operating valve helps maintain stable suction conditions, supports efficient cooling, and can reduce symptoms like coil icing, poor capacity, or erratic superheat when the rest of the refrigeration circuit is in good condition. Because TXV selection is system specific, match the Bard 800-0086 to your unit model and serial, and follow proper refrigerant handling and evacuation practices during replacement to protect the compressor and restore designed performance.