Ice building up in the freezer
1.
If the freezer door is opened frequently or kept open too long a layer of frost may build up on the freezer interior walls.
2.
Ensure the door seal is clean and not damaged.
For more information, see the Cleaning the door seal topic.
3.
If the frost is thick, defrost the freezer when the food level is low.
For more information, see the Defrosting the chest freezer topic.