Ask about the actual finding
Parts availability, access and the nature of the fault can affect the proposal. A damaged door assembly may lead to a different decision from a serviceable heating component.
Choose after scope is clear
Discuss the proposed work before proceeding. No fixed life extension or universal cost saving can be promised, and suitable work must be confirmed for the installed model.
A useful distinction
Cosmetic wear and functional failure are different considerations. Explain which result you need restored and any known additional defects, allowing a proposal to address the appliance's actual condition rather than only its age.