OEM Lennox Copeland Scroll Compressor — 11C34

The genuine OEM Lennox 11C34 is a Copeland scroll compressor designed to power your Lennox air conditioner or heat pump. It compresses refrigerant and drives it through the condenser and evaporator coils, making it the single most critical component in the cooling cycle. Built to Lennox factory specification, the 11C34 delivers the exact capacity, energy efficiency, and low-vibration performance your system was engineered to provide.

Common failure symptoms: a failing compressor commonly presents as a system that runs but produces no cold air, a hard-starting unit that hums and trips the breaker, unusual grinding, knocking, or rattling sounds, or frequent shut-downs when the internal overload protector trips from overheating. An electrically failed compressor with an open or shorted winding will not start at all.

Why OEM matters: Your Lennox system is balanced and charged around a specific compressor. Installing the genuine 11C34 maintains correct refrigerant flow, protects your equipment warranty, and avoids the reliability and efficiency problems typical of off-brand replacements. This is a direct factory-fit part that restores rated capacity and dependable, long-term operation.