The thermostat that has a resistance seems. I'm going to change it. Test with the tester and have it continued. Would the button panel be another fault?
The thermostat may have continuity but the contacts may be stuck and therefore does not cut off the current when the water reaches the cut-off temperature. But at the same time the thermal safety that acts when the thermostat has this fault and the water boils. You must change both elements. Arming