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The Bard S917-0137 desuperheater coil assembly is an OEM refrigerant-side heat exchanger component used in certain Bard wall-mount HVAC configurations to reduce discharge gas superheat before the refrigerant moves on through the system, helping protect downstream components and maintain stable performance. If you are troubleshooting high discharge temperatures, capacity issues, or refrigerant temperature control problems, replacing a damaged or restricted desuperheater coil with the correct Bard factory part can restore proper heat transfer and fit without field modifications. Verify compatibility by matching S917-0137 to your unit model and serial data, and follow proper refrigeration service practices for recovery, brazing, evacuation, and leak testing during installation.