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The Bard 905-0495 Heating Expansion Valve Assy is an OEM refrigerant metering component used in Bard wall mounted HVAC equipment to control refrigerant flow for proper heating operation, helping maintain stable coil performance and protect the system from poor superheat control. Replacing a faulty or restricted expansion valve assembly can resolve symptoms like weak heating capacity, abnormal pressures, or inconsistent coil temperatures when the rest of the refrigerant circuit checks out. As a genuine Bard part, 905-0495 is built to match factory fit and performance, but you should confirm compatibility by unit model and serial number before ordering since expansion valve assemblies can vary by series and configuration.