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The genuine OEM Lennox 14F78 is a Copeland ZR57K3E-TF5-830 scroll compressor rated at 57,200 BTUH, operating on 200/230 volts, 3 phase, and designed for R-22 and R-407C refrigerant. As the heart of your Lennox condensing unit, it compresses refrigerant vapor and circulates it through the system to deliver reliable cooling. Its scroll design provides quiet, efficient, and durable operation with fewer moving parts than reciprocating compressors.
Common failure symptoms: the outdoor unit hums but won't start, frequent tripping on overload, a burnt electrical smell, loss of cooling capacity, loud grinding or knocking noises, or a compressor that runs but fails to build pressure. A locked rotor or open winding typically means replacement is required.
Why OEM matters: the 14F78 is factory-matched to Lennox tonnage, electrical, and refrigerant specifications, ensuring correct fit, rated capacity, and full compatibility with your system's controls. Aftermarket substitutes risk improper oil charge, capacity mismatch, and voided warranty coverage. Choose the genuine Lennox part for a dependable, code-compliant repair.