A replacement involves suitability, connections, clearances and stability arrangements beyond diagnosing an existing fault. Those tasks need their own scope and competence.
What the observation means
A new appliance of the same width can have different electrical or gas requirements. The old installation is not automatically suitable.
A useful next step
Discuss repair and replacement fitting separately. This breakdown service should not be interpreted as an offer of new installations or gas conversions. Do not disconnect the old cooker in anticipation of a repair visit unless the appropriate professional has arranged it.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.