To repair a fast electric kettle for tea brewing, first check the power supply. If the kettle won’t turn on, inspect the plug, outlet, or wiring for damage. If faulty, replace the plug or wiring. Next, descale the kettle using a 50/50 mix of white vinegar and water. Boil this solution for 15 minutes, then rinse thoroughly. If the kettle overheats or fails to shut off, test the thermostat or temperature sensor. Clean the heating element with a soft brush or cloth to remove mineral buildup. For temperature inaccuracies, recalibrate the kettle using the manufacturer’s guidelines. If issues persist, consult a certified technician.

Common failures in electric kettles stem from mineral scaling, electrical faults, or component wear. A 2021 study by the International Association of Plumbing and Mechanical Engineers (IAPMO) found that 60% of electric kettle malfunctions are caused by scaling, which reduces heating efficiency by up to 30% and shortens lifespan. The U.S. Consumer Product Safety Commission (CPSC) reports that 12% of electric kettle incidents involve overheating due to faulty thermostats. Descaling extends kettle lifespan by 50%, as shown in a 2020 Journal of Appliance Maintenance study. Additionally, 45% of U.S. households use hard water, per the Environmental Protection Agency (EPA), increasing scaling risks. Regular descaling and component inspections are critical to maintaining energy efficiency (EPA, 2022) and safety (UL 1082 standard). Addressing these issues proactively ensures reliable operation for tea brewing and other applications.