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Bard 905-0355 is an OEM heating expansion valve assembly that meters refrigerant flow for the heating cycle on compatible Bard wall mounted HVAC units, helping the system maintain proper superheat and stable capacity under varying loads. When a heating TXV is sticking, restricted, or out of calibration, you can see poor heat output, coil freeze risk, or nuisance pressures, so replacing it with the correct Bard factory valve assembly is the best way to restore designed performance and reliability. Confirm unit model and serial compatibility before ordering, since expansion valve selections are matched to specific circuits and refrigerants.