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The Lennox 11K66 is a genuine OEM Copeland ZP16K6E-PFV-830 scroll compressor rated at 15,750 BTUH (roughly 1.3 tons) on 208/230V single-phase power for R-410A systems. As the refrigerant pump at the center of your Lennox outdoor unit, this compressor pressurizes and circulates refrigerant through the coils to remove heat and keep your space cool. It is built to the exact capacity, electrical, and mounting specifications required by compatible Lennox equipment.
Common failure symptoms: warm air from the supply vents, the condenser fan running while the compressor stays silent, tripped breakers, hard-start or short-cycling behavior, loud knocking or rattling, and repeated thermal overload trips. An electrically failed or locked-rotor compressor will stop cooling entirely.
Why OEM matters: the factory-specified 11K66 ensures the correct scroll displacement, winding characteristics, and internal overload protection your Lennox R-410A system depends on. Generic or mismatched compressors risk incorrect capacity, poor oil return, lost efficiency, and early failure. Choosing OEM guarantees precise fit and rated performance.