Yes, you can leave ice sitting in your residential ice maker overnight, provided your freezer remains powered, closed, and properly cold. For built-in refrigerator ice makers, the ice storage bin sits inside the freezing compartment, ensuring that overnight storage keeps the cubes solid without melting. However, for portable countertop ice makers that lack active refrigeration freezers, leaving ice overnight will cause it to melt completely back into the water reservoir, ready to be refrozen the next day.
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