Separate normal food sounds from a new noise at controls, switches or the housing. Location and associated smell matter more than the word crackling alone.
What the observation means
Do not lean closer to a hot compartment or electrical fitting to investigate. A sound that continues after food is removed or comes with flickering, tripping or a burning smell requires attention.
A useful next step
Stop use for suspected electrical symptoms and retain the sequence already observed. Do not repeatedly run the grill empty to reproduce the sound. Explain what was cooking and where the noise seemed to originate without claiming a confirmed component diagnosis.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.