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The genuine OEM Lennox R100040-34 is a Copeland ZP28K5E-PFV-830 scroll compressor rated at 27,900 BTUH and designed for 208/230V single-phase R-410A systems. As the heart of your Lennox condensing unit, this compressor circulates and pressurizes refrigerant to move heat out of your home, and its scroll design delivers quiet, efficient, and reliable cooling performance. It is a direct factory replacement engineered to the exact specifications of your Lennox equipment.
Common failure symptoms: A failing compressor often shows up as a unit that hums or clicks but won't start, tripping breakers, warm air from the vents, loud grinding or rattling noises, or a hard-start condition where the compressor struggles to spin up. Electrical faults such as a shorted or open winding and internal mechanical seizure are the most frequent causes of replacement.
Why OEM matters: Choosing the genuine Lennox R100040-34 guarantees correct displacement, oil charge compatibility, and electrical characteristics for your system. Aftermarket substitutes can void warranties and cause premature failure or reduced efficiency. Installing the exact OEM part protects your investment and restores rated capacity to your Lennox unit.