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Bard part number 5651-096 is an OEM hot gas bypass valve used in Bard wall-mounted air conditioners and heat pump systems to regulate refrigerant flow during low-load operation, helping stabilize suction pressure and reduce evaporator coil freeze-ups while maintaining steady comfort. When a system is short cycling, freezing, or struggling to control temperature in mild weather, a properly functioning bypass valve can be a key piece of restoring normal operation. Because application and settings can vary by model and refrigerant circuit, confirm compatibility by matching your unit model and the exact Bard part number 5651-096 before ordering, and install using standard refrigeration best practices including leak checks and proper system verification.