OEM Lennox Scroll Compressor 41500 BTU R-410A — 12Y51

The genuine OEM Lennox 12Y51 is an Interlink AQA042RAA scroll compressor rated at 41,500 BTUh, wired for 208/230V 3-phase power and designed for R-410A refrigerant. As part of the Lennox Interlink program, this scroll compressor is factory-matched to your unit's specifications, using two nested spiral scrolls to pressurize and circulate refrigerant with the smooth, efficient, and quiet performance that defines modern scroll technology. It serves as the primary workhorse of your Lennox condensing unit's refrigerant circuit.

Typical signs of a failing compressor include an outdoor unit that runs but won't cool, hard starting with breaker or fuse trips, loud humming or metallic grinding, and overheating that trips the internal thermal overload. A compressor that has lost compression or seized will keep the condenser fan spinning while delivering little or no cooling indoors.

Installing an OEM Lennox 12Y51 ensures the correct 208/230V 3-phase electrical match, 41,500 BTUh capacity, and R-410A-rated oil charge for your system. Because Lennox equipment is engineered as a matched assembly, a genuine Interlink compressor protects rated efficiency, maintains warranty coverage, and delivers the long-term reliability that generic aftermarket compressors routinely fail to match.