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Let it be an appliance. A window air conditioner or the normal model, microwave oven, fridge and many more. They all need maintenance from time to time. It is mandatory, you should give a maintenance service so that the appliances operate efficiently. In this article on how to maintain your window air conditioner in good working condition, we give valuable tips. You can follow the tips to make your home remain not only cool but also to control the high electricity bills.