No. Position, timing and the thermometer's own accuracy influence the result. Ovens regulate heat over time, so a single observation cannot establish the whole temperature pattern.
What the observation means
A thermometer close to a wall or element may respond differently from one positioned according to its instructions. Opening the door to read it changes conditions again. The appliance display may show a target rather than the instantaneous air temperature. These distinctions make casual comparisons less precise than they first appear.
A useful next step
If you already have readings, retain their positions, timing and selected function for the engineer. Do not add prolonged hot tests or attempt to adjust internal thermostats yourself. Repeated poor cooking with established settings is useful evidence alongside a thermometer record, but professional assessment is needed before attributing the problem to one component.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.