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Telltale Clues to Your Air Conditionerâs Life Span. 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.
That means you have a water heater that is 4 years past the end of an average lifespan of about 14 years, an air conditioner that is 2 years past an average lifespan of 16 years, and a roof that is at or near an average lifespan, depending of type of roof covering.