It's highly unlikely that your unit will last 30 years before it needs to be replaced; however, if you follow a regular preventive maintenance routine and operate it properly, your chances of keeping the same unit for about 15 years increase considerably. Air conditioners can last between 10 and 15 years, depending on several factors, while air conditioning systems can even last up to 30 years before needing to be replaced. As the leading repair company for heating, ventilation and air conditioning systems for commercial and residential use in Livermore, Dublin and Pleasanton, Superior Mechanical can do it all, from heating and air conditioning services to boiler services and plumbing services. I would like to learn more about how to find air conditioning repair services soon because I want to focus on repairing appliances in the next few years months.