I know nothing specific about fridges but from a purely scientific point of view I can offer the following observations:-
Facts:
The failure occurred at the moment of door opening.
The only electrical change that takes place when a fridge/freezer door opens is that the light comes on.
It is an observed fact that bulbs are most likely to blow at the moment of switching on. (low resistance / current surge)
When a lightbulb blows, there is a significant probability that the broken filament will fall and short the input contacts, thus blowing the fuse.
Deduction:
The failure you describe is most likely to be the result of the bulb failure and not a predictive symptom of major appliance failure.
PROGNOSIS:
I therefore predict that the appliance will resume normal working after the replacement of both the fuse and the bulb. It should give many years of future reliability.
Fingers Crossed
gen2