Yes, it is generally necessary to close the freezer door when using the ice maker on a refrigerator.
The reason for this is that the ice maker requires a consistent cold temperature to produce ice effectively. By keeping the freezer door closed, you help maintain a stable and cold environment inside the freezer compartment, which is necessary for the ice maker to operate optimally.
Leaving the freezer door open while using the ice maker can cause the temperature inside the freezer to rise, leading to inefficient ice production or even thawing of already-formed ice cubes. Additionally, warm air entering the freezer can cause frost buildup on the evaporator coils, which can negatively impact the freezer's overall performance.
To ensure proper ice production and maintain the desired temperature in the freezer, it's best to keep the freezer door closed when using the ice maker.