LG refrigerator ice maker not making ice. water line Frozen

this refrigerator was not producing ice tested the water dispenser. we were getting water to the dispenser. also test ed. the water line coming to the door for the ice maker was getting water. found out that the line inside the door was frozen. ran the test on the ice maker and wasn't getting water into it. ended up having to defrost the line and after that it started making Us