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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.
Categories: Buying Central A/C. There are many factors that affect how long a central air conditioner will last. According to ASHRAE, an HVAC industry organization, a central air conditioning system can last on average 15 years.ategories: Buying Central A/C. There are many factors that affect how long a central air conditioner will last. According to ASHRAE, an HVAC industry organization, a central air conditioning system can last on average 15 years.