The heat of summer will soon be bearing down, giving millions of window-mounted air conditioners a real workout. Many owners of said units are wondering why their air conditioners aren’t working properly. Good news! In most situations, consumers can fix a window air conditioner themselves, provided they have the right information and an inexpensive handy tool. If you have a window air conditioner in your home, here’s what you need to know to fix it, clean it, and make it like new. An Easy Do-It-Yourself Project More than any other household appliance, window-type air conditioning units are the most frequently neglected. This is a pity because one that is operating poorly can be a big energy guzzler. A little maintenance means that homeowners can save money on both utility and repair bills. With the right information and access to replacement parts, you should be able to repair a window air …