Regular servicing and repair of ducted air conditioning systems is necessary to ensure that the ducted system stays in good shape with joints at the air conditioning unit and room entry vents stay well connected and the duct tube stays airtight.
If the ducting leaks for any reason, either conditioned air will escape, or dust and dirt will enter the system. This may clog the filters prematurely with a resulting increase in running costs.
You can extend its operating life by attending to your air conditioning at regular intervals. Like any mechanical piece of equipment (car, boat etc.) routine inspections help detect minor issues before they become a big issue.