OEM Lennox Tandem Scroll Compressor Assembly — 11G79

The genuine OEM Lennox 11G79 tandem scroll compressor assembly is the primary component that pressurizes and circulates refrigerant through your Lennox condensing unit. Its tandem arrangement of two scroll compressors provides staged capacity, so the system can meet partial loads efficiently and ramp up on hot days — improving comfort, dehumidification, and energy use over a single-stage design.

Common failure symptoms: a struggling or dead compressor commonly presents as humming without startup, tripped breakers, warm supply air, loud knocking or rattling, or continuous running that never satisfies the thermostat. These point to worn scrolls, electrical faults, or a locked rotor.

Why OEM matters: Lennox designs each system around a specific compressor's capacity and electrical profile, so a non-OEM substitute can compromise charge, staging, and protective controls. The factory 11G79 assembly restores rated performance, keeps your equipment warranty intact, and fits without adaptation. Compressor replacement and refrigerant handling must be performed by an EPA-certified HVAC professional.