If an electric kettle doesn't have a plug and water is heated inside, several potential scenarios could occur, none of which are safe or recommended:
Electrical hazards: Without a plug, the kettle won't be connected to a power source, so it won't heat up. However, if the heating element is still active or if there is a malfunction, it could cause electrical problems. This can include short circuits, sparks, or even electrical fires.
Overheating: If the kettle's safety features, such as an automatic shut-off or a thermostat, are bypassed or disabled, the heating element could continue to heat up indefinitely. This can result in the water inside boiling dry, leading to overheating of the kettle. This could cause damage to the kettle, such as melting the plastic components, and pose a fire risk.
Steam pressure buildup: When water boils, it produces steam, which expands and creates pressure. Without a proper outlet, such as a spout or lid with a vent, the steam would accumulate inside the kettle. As pressure builds up, there is a risk of the kettle bursting or exploding, potentially causing injuries or property damage.
It's important to always use electrical appliances according to their intended purpose and follow safety guidelines provided by the manufacturer. If an electric kettle is missing a plug or is not functioning properly, it is best to avoid using it and have it repaired or replaced by a professional or the manufacturer.