Identify the selected symbol
Copy the cooking symbol and affected cavity rather than calling every function fan oven. State whether the temperature indicator behaved differently on the failed selection.
Why assessment helps
An engineer can compare the requested function with the model's design and inspect the relevant circuit. A working grill alone is not enough evidence to order a fan element.
A useful distinction
If the grill is in a separate cavity, make that clear. Its operation may say even less about the failed oven than a grill selection in the same cavity, so the physical layout matters.