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The genuine OEM Lennox 55W28 is a Copeland ZP39K5E-TF5-830 scroll compressor rated at 39,000 BTUH, 200/230V, 3-phase, and built for R-410A refrigerant. This compressor is the core component of your Lennox condensing unit, compressing refrigerant vapor to move heat out of the conditioned space. The ZP-series scroll design is engineered specifically for the higher operating pressures of R-410A, delivering efficient and durable performance.
Common failure symptoms: Watch for the unit running without cooling, breaker trips on startup, loud humming or buzzing without the motor turning, repeated tripping on the internal overload, short-cycling, or grinding and knocking sounds. Weak airflow temperature drop and climbing electric bills often point to a compressor nearing the end of its life.
Why OEM matters: R-410A systems run at pressures roughly 50–70% higher than R22, so using the exact factory-specified 55W28 is critical for safe, reliable operation. The OEM part guarantees correct displacement, oil type, and electrical ratings for your Lennox system, preserving rated efficiency and warranty coverage. Confirm voltage, phase, and refrigerant compatibility, and use a licensed technician for installation.