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The genuine OEM Lennox 78K22 Compressor Replacement Kit (factory reference LB-91242A) is engineered for Lennox systems using the ZR72KC scroll compressor. As the heart of the refrigeration circuit, the compressor pressurizes and circulates refrigerant to move heat into or out of your home. This kit includes the correctly matched compressor and installation components required to restore full cooling capacity to your Lennox unit.
Common failure symptoms: A failing compressor typically presents as a system that runs but won't cool, tripped breakers or hard-start conditions, loud grinding or knocking noises, a compressor that hums but fails to start, or a unit that short-cycles on internal overload. When a technician confirms an electrical or mechanical compressor failure, a direct OEM replacement is the reliable fix.
Why OEM matters: The ZR72KC compressor is matched to your Lennox system's refrigerant charge, tonnage, and electrical characteristics. Using the OEM 78K22 kit ensures correct displacement, oil charge, and terminal configuration, protects warranty coverage, and delivers the efficiency and longevity Lennox engineered into your equipment. Generic compressors risk capacity mismatch, premature failure, and costly callbacks.