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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.
An average air conditioner will last around 20 years with the proper maintenance. However, units that get heavy usage may not live this long. If you live in an area with high humidity, or average summer temperatures above 90 degrees, the lifetime of your unit can be cut by almost half.