Modern split systems have a life expectancy of around 10 years. If you are wanting to get a technician out remember that parts may no longer be available for your unit and you could be throwing money away by getting someone out to simply tell you the unit is too old and needs to be replaced anyway. Depending on the symptoms, if it is fairly obvious the unit requires significant repair we recommend replacing it at that age. By simply advising the staff over the phone of the symptoms and the age it could save you a call out.