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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.
The average air conditioning system will last between 10-15 years. Even if your air conditioning system has not stopped working completely, it could be worth looking into replacing your older system for a new system that is more energy efficient. The cost of air conditioning replacement has many variants, including: