Quote Originally Posted by CptnBlues63 View Post
Mine has an alarm. It squeals in a most annoying (and constant) fashion until you fill it. It also runs continuously.
Oddly enough, after work yesterday I stepped into my office at home and the "out of water" alarm was screaming.......

There is a button on the one side you press to shut the alarm off. I don't bother shutting the unit itself down while refilling, I just leave it run. There is also a switch on the other side of the unit to turn the alarm on or off. The only problem is, it isn't labeled on/off and the documentation that comes with the unit doesn't specify which way is on and which off so I wrote the manufacturer and asked them. They were kind enough to respond.