Maintenance, Maintenance, Maintenance, I can’t stress it enough. Your new system needs maintenance just like your automobile needs maintenance. Would you drive your car for 10 years and never check or change the oil? Never having your air conditioning system serviced will usually result in a premature system failure and a big repair bill, not to mention the high operating costs up to that point. Please treat your new system like you would a new car and have it looked after by a competent and licensed company.