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The genuine OEM Lennox 11B76 is a Copeland ZR72KCE-TF5-830 scroll compressor rated at 72,000 BTUH on 200/230 volts, 3 phase. It serves as the core of your Lennox condensing unit, compressing and circulating refrigerant to move heat out of the conditioned space. The scroll mechanism delivers smooth, high-efficiency operation with excellent durability and lower sound levels than piston-style compressors.
Common failure symptoms: the unit trips the breaker on startup, hums without starting, overheats and cuts out on internal overload, produces loud metallic knocking, or runs continuously with little to no cooling. Grounded or shorted windings and mechanical seizure are clear signs the compressor has failed.
Why OEM matters: the 11B76 is engineered to match your Lennox system's capacity, voltage, and oil charge exactly. Using the factory-specified compressor protects your warranty, guarantees rated performance, and ensures compatibility with the unit's contactor, capacitor, and controls. Trust the genuine Lennox part for a lasting, worry-free replacement.