1, poor contact of power supply, improper operation method, failure of thermostatic kettle parts, and start of dry burning prevention system. Let's see what caused it. For example, there are many reasons to start the anti-dry burning system. We can see if there is water in the thermostatic kettle. If there is no water, try adding water to see if there is noise.

This situation is probably caused by poor contact or improper operation. It is also possible that the anti-dry burning system is started or you put more water than the marking line, and it will also call the police.