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The genuine OEM Lennox 11A94 (Copeland CR24K6E-PFV-875) is a 22,600 BTUH reciprocating compressor built for 208/230V, single-phase, R22 systems. As the heart of your Lennox condensing unit, it circulates and compresses refrigerant to drive the entire cooling cycle. Sourced to exact factory specification, it delivers the capacity, oil charge, and electrical characteristics your system was engineered around.
Common failure symptoms: the unit runs but no longer cools, the compressor hums and trips the breaker on start, loud knocking or rattling from the outdoor unit, a compressor that won't start (open windings or seized rotor), or repeated overload tripping. A grounded or shorted motor winding will also cause immediate failure to run.
Why OEM matters: Lennox rates system performance, refrigerant charge, and warranty coverage around the factory compressor. A properly matched 11A94 maintains rated efficiency and protects the rest of the sealed system, whereas a mismatched aftermarket unit can cause oil-return problems, capacity loss, and premature failure. Always replace the filter drier and verify charge when installing. Note that R22 is a phased-out refrigerant, so this part is intended for servicing existing legacy Lennox equipment.