Although Australia's climate is usually temperate, it can get quite extreme, more so during the summer. And once the high humidity and scorching heat come about, the last thing you would want is to be stuck indoors with a faulty air conditioning system. Yet, this is likely to happen if you are not giving this system the care and maintenance that it needs. Admittedly, some AC problems tend to crop up seemingly spontaneously and can be attributed to old age and normal wear.