Extending Your AC Unit's Life Requires Preventive Maintenance Every Two Years

https://blogfreely.net/lithilszxt/h1-b-manual-j-load-standards-determine-your-units-ideal-service-frequency-1p94

A central AC unit typically lasts 15 to 20 years, but preventive maintenance through regular tune-ups directly extends that lifespan by catching small issues before they cascade into reactive repair costs