What if the heating element of an electric noodle boiler fails?

Please verify the following points and require itemized written supplier responses:（commercial noodle boiler noodle-boiler-element） Signs include no heat, slow heating, tripping breakers or corrosion. Scale, dry heating and low water can shorten element life. Use matching replacements and check residual current protection after repair. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.