Air conditioners make the air around them colder. The refrigerant which runs through the coils sucks the heat right out of your house. That means that the coils themselves are very cold. No wonder you sometimes see air conditioners with layers of ice developing on the coils!
Unfortunately, that’s actually a very bad sign. Ice does not form on air conditioners during normal operation. The coils should be cold, yes, but they should also be absorbing heat, and thus never actually freezing. If your air conditioner has ice on it, what in the world is going on? What can you do about it? Does it need repair? We’ll investigate together.