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The genuine OEM Lennox 19A07 is a ZP51K6E-TFD scroll compressor rated at 4.5 tons for 460V 3-phase systems. This component pressurizes and circulates refrigerant through the condenser and evaporator, driving the entire refrigeration cycle that removes heat from your building. Its Copeland scroll construction provides smooth, efficient, and durable performance for commercial and light-commercial Lennox equipment.
Watch for failure symptoms such as the unit failing to start, breakers tripping on startup, excessive vibration or metallic knocking, insufficient or no cooling, and repeated short cycling. A compressor drawing high amperage or tripping its internal overload usually indicates worn bearings or a failing motor winding.
Installing the OEM 19A07 ensures the exact displacement, refrigerant compatibility, and 460V electrical specs Lennox designed the system to use. Generic substitutes risk mismatched capacity, oil incompatibility, and voided warranties — the factory part restores rated efficiency and integrates cleanly with your existing controls and wiring.