Yeah I have seen that overflow condition before. It is caused by arcing. The main drive gear has a small copper plate. It works like bumper cars at the fair. As the wheel rolls over the probe, arcing occurs for the 7.5 seconds the valve is activated to fill the ice mold. That dude gets to arcing and instead of 7.5 seconds of water you get 20 seconds worth and that overflow usually drips down into the ice bucket and makes the ice cubes stick together.