Frosting/Icicles are formed on the ceiling of the freezer?
Icicles/Frosting can form when door is not closed tightly in humid summer weather or when cool air leaks.
It is due to encounter of hot air (outside) and cool air (inside) when door is opened and closed,
and occurs more frequently in summer or monsoon season as humidity level is higher.
The phenomenon will disappear when weather gets cooler.
Sudden formation of icicles/frosting is usually due to a door not closed tightly.
How to fix
Check stored food and shelf assembly to see if the door can be closed firmly.
Clean icicles/frosting on the ceiling with a warm towel before use.