The average lifespan of a central AC unit is 15 to 20 years with proper maintenance. In Los Angeles and the San Fernando Valley, hot summers, high UV exposure, and long cooling seasons push units toward the lower end of that range, 12 to 17 years is realistic for most Valley homes. Ductless mini-split systems tend to last longer at 20+ years because they run less under extreme load, and commercial rooftop units land at 15 to 18 years thanks to heavier duty cycles. The factors that most extend lifespan are annual professional tune-ups, regular filter changes every 30 to 90 days, keeping the outdoor condenser clear of debris, and proper sizing at installation to avoid short-cycling. Neglected units often fail 5 to 7 years early, at which point it's worth weighing repair costs against the value of a new HVAC installation. Call LA Heating and Air at (818) 660-1062 to schedule a tune-up.
