Have you ever wondered why some air conditioners seem to last forever while others give up the ghost after just a few years? What if I told you that the secret to a long life air conditioner isn't luck—it's maintenance? And here's the kicker: most of the things that kill your AC prematurely are completely preventable.   Your air conditioner is one of the hardest-working appliances in your home, especially during those scorching Australian summers. Yet it's also one of the mos