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The genuine OEM Lennox 11Y03 is an Interlink tandem scroll compressor assembly rated at 51,500 BTUH for 575V, 3-phase R-410A systems. This tandem scroll pair compresses and circulates refrigerant to power the cooling cycle, and its staged design provides efficient part-load operation and steadier comfort. It is the direct factory replacement for the ABA051TAB application.
Common failure symptoms: A failing compressor often shows up as a loss of cooling, repeated breaker trips, hard starting or a locked rotor, unusual grinding or rattling noise, or overheating that trips the internal overload. Burned or shorted motor windings and refrigerant migration issues are also common indicators that the 11Y03 should be replaced.
Why OEM matters: Lennox builds this compressor to precise 575V electrical, oil, and displacement specifications for your equipment. Installing the OEM 11Y03 guarantees proper voltage match, R-410A compatibility, and rated performance while keeping your Lennox warranty intact — protection generic replacements simply can't offer.