If the bin fills with ice, the ice pushes up a wire arm, which shuts off the icemaker until the ice level in the bin goes down again.
For small-scale ice production, many modern home refrigerators can also make ice with a built in icemaker, which will typically make ice cubes or crushed ice.
They produce crescent-shaped ice like the ice from a freezer icemaker.
Water with impurities requires lower temperatures to freeze and will continue to wash down the surface and through the drain of a commercial icemaker.
