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The genuine OEM Lennox 11Y01 is an Interlink tandem scroll compressor assembly rated at 51,500 BTUH for 208/230V, 3-phase R-410A systems. Working as the core of your Lennox unit, this tandem scroll set compresses and moves refrigerant through the system, while its dual-compressor staging delivers efficient capacity control and consistent cooling. It is the direct factory replacement for the ABA051RAB application.
Common failure symptoms: Signs of compressor failure include no cooling output, the breaker tripping on start-up, hard-start or locked-rotor conditions, loud knocking or grinding, and short-cycling from an overheated overload. Electrical faults like grounded or open windings and low insulation resistance also point to a worn 11Y01.
Why OEM matters: Lennox specifies this compressor to exact 208/230V electrical, oil-charge, and refrigerant parameters for your system. Choosing the OEM 11Y01 ensures correct voltage, R-410A compatibility, and factory-rated efficiency, and it preserves your equipment warranty — assurances aftermarket parts cannot match.