Controlled thawing keeps the food under appropriate conditions while the centre gradually thaws. A worktop can let the outside warm substantially while the middle remains frozen.
What the observation tells you
The hard centre is not evidence that the whole item is safely cold. Large packages make this unevenness more likely. A freezer repair should not turn into an improvised thawing process for all its contents without a food plan.
A useful next step
Follow the food's instructions and official guidance, commonly using suitable refrigerator storage. Keep raw juices contained and separate. Plan cooking and use after thawing rather than repeatedly moving food between warm and cold locations.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.