There are few routine maintenance tasks that do more than maintain a maintenance program for the air conditioner. Not only will you have the best chance to stay cool throughout the summer and avoid emergencies but also save money on your energy bills. Air conditioners perform properly when they are annually maintained. With proper maintenance, air conditioner will work more economically and will be more reliable in the coming years. Replacing the air filter in the air conditioner (or cleaning it if it has a reusable filter) is one of AC’s most important maintenance tasks. It should be done every month during peak periods (such as summer and winter) and once in autumn and spring.