Do you think the subject of maintaining air conditioners does not apply to you? If you have an air conditioner and care how much it costs to run it this should be a subject of great interest to you. You may not be the one doing the maintenance, but someone should. Properly maintaining your AC means lower energy bills and longer life for the air conditioner unit.
A professional is not required for simple maintenance procedures. There are some projects that you can tackle yourself. But first, a word of warning: Please remember, safety first. Do not touch anything unless the power to it is disconnected. If you are unsure of what you are doing, it may be best to leave it to a professional in air conditioner maintenance and repair.