Re: Bosch Freezer Fan GSU34420GB/01
Normally iced over evaporator caaused by door being left open is a common problem on these. It might be a pain but a full defrost is always first course of action.
Can you see icy snow through the grills in the top of the freezer ?
If the problem the re-surfaces , next focus point would be checking for an open circuit defrost heater . Unfortunately , its not the easiest thing to get to but basically the front grill unclips and this exposes the connectors for NTC , thermal fuse and defrost heater……but these can’t be accessed if the evaporator is frozen over .