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The genuine OEM Lennox 41K45 is a Tecumseh AVD5535EXG reciprocating compressor rated at 34,800 BTUH, 460V, R-22 refrigerant, 3-phase. As the heart of your Lennox outdoor unit, the compressor pressurizes and circulates refrigerant through the system to enable heat transfer — without it, your air conditioner or heat pump cannot cool or heat. This part is engineered to Lennox factory specifications for exact fit and rated performance.
Common failure symptoms include the outdoor unit not cooling, the compressor humming or clicking without starting, tripped breakers, hard-starting, loud knocking or rattling noises, and warm air from the supply vents. A failed compressor often follows electrical faults, refrigerant issues, or age-related wear.
Why OEM matters: Choosing the genuine Lennox 41K45 guarantees correct displacement, electrical characteristics, and mounting geometry for your specific Lennox equipment. Aftermarket substitutes can cause capacity mismatches, premature failure, and may void your warranty. Installation should be performed by a licensed HVAC technician. In stock and ships same day when ordered before the daily cutoff.