It confirms only the indicator's state, not that the entire heating path is working. The control arrangement must be understood for the specific cooker.
What the observation means
A lamp can be separate from the element and its regulation. A wrong mode, incomplete selection or component fault can produce superficially similar observations.
A useful next step
Check the normal owner controls and record the exact selection. If the grill remains ineffective, arrange assessment without probing or dismantling it. Do not infer the required replacement part from the lamp alone, and do not leave food under an unreliable grill for an indefinite period.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.