The lifespan of a home air conditioner varies depending on numerous factors. Well-maintained units should last 10 to 15 years. Many systems may be made to last even longer by performing frequent checks and repairs.
When your system is around 15 years old, it's time to start looking at new equipment so you're ready when it's time to replace it. You'll want to learn about the most contemporary, energy-efficient choices available and obtain a price estimate from a certified HVAC professional.