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The genuine OEM Lennox 11X79 is a Copeland ZP42K6E-PFV-130 scroll compressor rated at 42,400 BTUH for 208/230V, single-phase R-410A systems. Sized for larger 3.5-ton class Lennox condensing units, its high-efficiency scroll design compresses refrigerant continuously for quiet operation and strong, consistent cooling capacity. This exact-match component returns your system to its engineered performance.
Common failure symptoms: inadequate or no cooling on a large load, warm supply air, a compressor that hums or trips the breaker without starting, reversed-rotation scroll noise, or excessive vibration and grinding. High head pressures and repeated short-cycling on the internal overload are also signs the compressor is failing.
Why OEM matters: the high operating pressures of R-410A demand a compressor matched precisely to Lennox's displacement, oil charge, and terminal ratings. The OEM 11X79 guarantees correct capacity and a direct drop-in fit, preserving rated efficiency and protecting your Lennox equipment from the premature failures that plague mismatched aftermarket replacements.