The typical lifespan of an air conditioner can vary depending on a few factors. With proper installation and routine maintenance, an air conditioner can last 10-15 years. However, even with regular maintenance, air conditioners eventually wear out and need to be replaced. In the High Desert/Inland Empire area, we rely on our air conditioners quite heavily. So it’s not uncommon for homeowners here to get their AC system replaced more often than the average homeowner in the United States.