According to the recommendations of the majority of manufacturers of air conditioners, the devices should be serviced regularly, at least twice a year. Non-serviced devices often lose performance due to the settlement of pollutants at:

subassemblies, which further shortens their lifetime and may even cause a failure;
filters, which are not cleaned regularly, can cause malaise and respiratory disease (Legionnaires' disease).

During the maintenance of the device, it is also important to check the tightness of the connections of freon pipes, because any loss of refrigerant can have a big impact on shortening the compressor's life and even its damage.