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Telltale Clues to Your Air Conditionerâs Life Span. 1  The A/Câs age â The average air conditioner life span is roughly 15 years. If yours is over 10 years old, you can expect to see a steady loss of cooling capacity and efficiency. Older equipment is more prone to breakdowns too, so necessary repairs are more frequent.
Cancel. Home air conditioners should last for up to 30 years, though improper installation can reduce the lifespan of a unit. Discover the factors that affect the lifespan of an central air conditioner with help from an AC technician in this free video on heating and cooling the home.ancel. Home air conditioners should last for up to 30 years, though improper installation can reduce the lifespan of a unit. Discover the factors that affect the lifespan of an central air conditioner with help from an AC technician in this free video on heating and cooling the home.