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The genuine OEM Lennox 99K43 is a Copeland ZR94KC-TF5-950 scroll compressor delivering 96,500 BTUH on 200/230-volt, 3-phase power with R-22 refrigerant. This compressor pressurizes and circulates refrigerant through your Lennox system, making it the single most important component in the cooling process. Built to Lennox factory specifications, its scroll mechanism provides efficient, low-vibration performance and a direct drop-in fit for the units it was designed to serve.
When a compressor begins to fail, you may notice warm air at the registers, the outdoor unit buzzing without starting, a tripped breaker, hard-starting, unusual grinding or knocking sounds, or frequent short-cycling. These symptoms point to worn scrolls, electrical winding faults, or loss of compression.
For R-22 systems, matching the exact OEM 99K43 is essential — refrigerant type, voltage, and capacity must align with your equipment to preserve efficiency and warranty. Non-OEM replacements often carry different oil charges and tolerances that can compromise the sealed system. Order now with same-day shipping so your technician can restore full cooling quickly.