Iron cannot be transported around the body's circulation system as free iron, since it would be susceptible to chelation by siderophores, or may precipitate as iron(III) oxide, or may form iron(II). Therefore, a specific transport protein is required, called transferrin. (In fact, a whole class of transferrin-like proteins is involved in iron transport.) Transferrin is a medium-sized protein with a relative molecular mass of about 80 000.
Important: Do not reset your ice maker more than one time in a twenty-four hour period. in the ice tray over filling. If the ice tray over fills, water will pour directly into the ice bucket and freeze. the ice bucket is frozen you will not be able to dispense ice.
Most Frequent Causes for Refrigerator ice maker not working. If the freezer temperature is above 10 degrees Fahrenheit (-12C), the ice maker will not produce ice cubes efficiently. The freezer temperature should be set between 0 and 5 degrees Fahrenheit (-18 to -15C) for the ice maker to work properly.