At which evaporator temperature does an ice maker begin to produce ice?

The correct temperature at which an ice maker begins to produce ice is 20°F. This is the temperature necessary for water to freeze effectively and form ice cubes. Ice makers rely on the refrigeration cycle to lower the temperature of the evaporator, which allows the water inside the trays to freeze rapidly.

When the temperature of the evaporator reaches around 20°F, the water is sufficiently cold enough to transition into a solid state, facilitating ice production.

While freezing point for water is technically 32°F or 0°C, those temperatures are not low enough for efficient ice production in a commercial ice maker, which requires a much colder environment to ensure rapid and consistent ice formation. Thus, the optimal temperature for ice production is 20°F.