If you get the NTC fail/NTC short sign on display, it means the communication between the kettle and the base is blocked. When faced with this situation, follow the related steps below depending on the cause of the problem: 1. The connectors at the bottom of the kettle (five rings under the kettle) should be checked to ensure that there are no particles between them, and if any, such particles should be cleaned. 2. If one of the connectors is exposed to water, the connectors should be cleaned and dried with a cloth. The kettle should be put upside down apart from the base for 4-5 hours to remedy the issue completely. To prevent it from happening again, please do not wash the outside of the kettle under tap water, and only wipe it with a damp cloth. Getting the NTC fail/NTC short sign may cause the device to lock itself. In this case, please reset the kettle by unplugging it and then plugging it back.