Two reasons:

It is the pressure limiting valve is damaged, you can find after-sales to buy the same model replacement.

It is the thermostat is broken causing overpressure, it is more dangerous, you need to find after-sales service.

Precautions for the use of voltage cooker:

To choose a brand voltage cooker, so that the quality can be guaranteed, after-sales service is also guaranteed.

When using a pressure cooker for the first time, you must read the instruction manual of the pressure cooker.

When using, carefully check whether the voltage cooker is normal. Do not use it in a flammable, explosive or humid environment.

When using the pressure cooker to put food ingredients, do not put in too full of ingredients.

Don't open the lid halfway during the heating process to prevent food from bursting out and burning your skin. At the end of the confirmation of cooling before, also do not remove the weight or pressure regulator, lest the spray out of food injury. Do not open the lid until after natural or forced cooling.