Note whether flickering relates to normal door movement or occurs continuously. Do not repeatedly move a suspect switch or expose the light assembly to investigate.
What the observation tells you
A connection, sensor or lamp issue cannot be diagnosed solely from flickering. The food may still remain frozen, but electrical damage or burning smells require immediate safe action. A replacement bulb should not be chosen without checking whether the model uses a service-only LED unit.
A useful next step
Provide the model and a brief safe description or recording. Leave electrical inspection to a qualified person and monitor storage separately.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.