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 what happens on your air conditioner. when running the aircon minimum 8hr/per day, you should check the aircon for 3 months once. the reason is more no of dust’s stay on the fan blower and air filter may dirt. when more dust lay on the air filter, you will not get clean air.