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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.
Air-Conditioning and Heat Pump Efficiency 101. At some point during their ownership, many homeowners may have to replace their central air-conditioning systems. The average life span of central air-conditioning system is 12- to 15- years if it is properly installed and maintained. Heat pumps have about the same life-span â about 14 years â when recommended maintenance is followed. Newer units manufactured in recent years are expected to last even longer.