What is the average lifespan of a Goodman AC unit?

What is the average lifespan of a Goodman AC unit is 15 to 18 years with normal residential use and proper maintenance, which is similar to industry average for AC units of 15 to 20 years and slightly shorter than premium brands like Trane and Carrier at 16 to 20 years but same as Rheem and Ruud at 15 to 18 years. Goodman AC units including GSX14 14 SEER single stage, GSXC16 16 SEER two-stage, and GSXC18 18 SEER variable speed are built with Copeland scroll compressors and plate fin coils designed for 15-year service life. Average lifespan depends on climate, maintenance, and installation quality. In hot climate like Texas and Florida where AC runs 8 to 10 months per year with 3,000 hours annual run time, average lifespan is 12 to 15 years due to more wear and tear, thermal stress, and salt air corrosion near coast that eats coil fins. In moderate climate like North Carolina where runs 4 to 6 months with 1,500 hours annual run time, average lifespan is 15 to 18 years. Factors that shorten average lifespan include lack of annual maintenance with coil cleaning twice yearly, dirty filter causing high head pressure that strains compressor and reduces efficiency by 10 to 20 percent, poor installation with incorrect refrigerant charge and undersized ductwork causing high static pressure, and not replacing capacitor when weak causing compressor hard starting. Goodman offers 10-year parts and lifetime compressor warranty on some models when registered within 60 days, indicating expected 15-year life, and many owners report 15 to 18 year lifespan with only minor parts replaced.