Confirm exact appliance compatibility and whether the repair business accepts fitting it. Buying first does not establish that it causes the fault.
What the observation means
The reference, revision and return conditions matter, particularly for controls and gas-related components. A matching appearance can hide important differences.
A useful next step
Keep the order details and discuss fitting before booking. Do not install it as a trial. The engineer may need to assess the cooker before agreeing that the item is appropriate or that associated access work falls within the service offered.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.