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The Lennox 18W50 is a genuine OEM ZP36K5E-TFD-830 scroll compressor rated at 36,000 BTUH (approximately 3 tons) for 460V, 3-phase, R-410A applications. This compressor pressurizes and circulates refrigerant through your Lennox system, and its scroll design provides smooth, efficient, and reliable compression with fewer moving parts than reciprocating alternatives.
Common failure symptoms include no cooling, the compressor tripping the breaker or failing to start, excessive noise or vibration, overheating that trips the internal overload, or a system that short-cycles. Electrical failures (open windings, grounded motor) and mechanical seizure are the typical reasons a scroll compressor reaches end of life.
Why OEM matters: the 18W50 is engineered to Lennox's exact voltage, capacity, and refrigerant specifications, ensuring proper fit, correct oil charge, and matched performance. Choosing the OEM compressor over a generic substitute preserves system efficiency, protects your equipment warranty, and prevents capacity or electrical mismatches on 460V commercial and residential Lennox units. In stock and ships same day before 3PM CST.