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The genuine OEM Lennox 91W11 (ZPS49K5E-PFV-830) is a single-phase scroll compressor rated at 45,400 BTUh, built for 208/230V operation on R-410A refrigerant. Its precision scroll set compresses refrigerant in one smooth, continuous motion, delivering the quiet, efficient, and dependable cooling that powers the refrigeration circuit in your Lennox residential or light-commercial system.
When this compressor starts to fail, you'll often see reduced or no cooling, climbing energy bills, loud humming, knocking, or rattling, breakers that trip repeatedly, and short-cycling that leaves rooms uncomfortable. Worn scrolls, lost lubrication, or a shorted motor winding typically make replacement the right repair.
Choosing the OEM 91W11 ensures the exact 208/230V single-phase rating, capacity, and factory oil charge Lennox specified for your equipment. Aftermarket compressors can bring oil-charge and displacement mismatches that shorten system life and void warranty protection. The factory part restores rated efficiency and returns your Lennox system to peak performance.