Warranty terms may specify who to contact and how an assessment should be authorised. Checking first can prevent an avoidable dispute about an otherwise sensible repair enquiry.
What the observation tells you
An independent repair business should not be assumed to act for the manufacturer. A retailer plan and a manufacturer's warranty may also be different arrangements. Do not open covers or authorise a part purchase on the assumption that reimbursement is automatic.
A useful next step
Find the purchase details and plan documents, then contact the relevant provider for its process. You can still record the symptom and protect food while waiting. State clearly whether the enquiry is private work or provider-authorised work.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.