Aircon General service process to inspect and clean the air filter, Evaporator coil, Checking the gas level, Checking Circuit connect, etc. The process will remove the outer accumulated dirt and dust. When you do the regular aircon service, definitely it could not store any dust into your aircon. is your air conditioner not cooling properly? check with an aircon professional, about wh... https://surecool.com.sg/aircon-general-service/