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The genuine OEM Lennox 81W07 is an Interlink ABA036KAA scroll compressor rated at 36,500 BTUH for 208/230V, single-phase R-410A systems. Scroll compressors use two interleaved spirals to compress refrigerant smoothly and quietly, delivering higher efficiency and longer service life than older reciprocating designs. This is the exact factory-matched unit your Lennox condenser was engineered to run.
Common failure symptoms: insufficient or no cooling, a compressor that trips the breaker or buzzes without starting, unusually loud operation, or reversed rotation ("scroll noise"). You may also see the outdoor fan running while the compressor stays silent, elevated head pressures, or a system that short-cycles on the internal overload.
Why OEM matters: R-410A operates at significantly higher pressures than legacy refrigerants, so the compressor's displacement, oil type, and electrical ratings must match precisely. The OEM 81W07 ensures correct capacity and terminal layout for a clean bolt-in replacement, preserving rated efficiency and safeguarding your Lennox equipment against the mismatches that cause repeat failures.