Enquiry preparation
Oven: confirm who can authorise the work
For a oven enquiry: For a rented property, agree ownership, authorisation and the person providing entry. Have those arrangements available with the service address.
We agree suitable work and arrangements for your actual appliance.

For the appliance you actually own
Record the cavity, temperature setting and mode that was in use. A lit display or running fan can coexist with a heating problem on a particular function.
How this supports the discussion
The oven reference, fitting and observation allow a more specific discussion. They do not establish a failed part or guarantee a repair.
Confirm the proposed attendance
Confirm suitable work, proposed charges and access with the team. An enquiry notebook is preparation, not a reserved visit.