I can feel a very slight draft of cold air from the ceiling vent.
In the freezer, there is minimal frost and only on some freezer items, not on walls or back wall.
I took off the back panel and saw some frost but not enough to block the air passage.
However the fan was not turning so I flicked it and it started turning, so I think the fan was stuck. Is there anything I should do to prevent it from sticking in the future?