If it is raw on the surface, you can turn the raw rice to the bottom of the rice cooker and add water to simmer. If it is half-cooked, you can stick a hole in the raw place and add a proper amount of water to continue cooking. If a pot of rice is raw, you can poke a few holes in the bottom with chopsticks and add some boiling water before cooking. The reason may be that the cooking button is not pressed, the pot liner is not put properly, the permanent magnet can't attract the warm and soft magnetic force when the switch button is pressed, and the switch button is raised after the hand is raised. The permanent magnet of the rice cooker becomes weak or the temperature-sensitive soft magnetic falls off, or there is a fault inside the magnetic steel temperature limiter, and the travel bar cannot reach the top. It may be that the contact switch, moving contact and static contact of the magnetic steel temperature limiter of the rice cooker are badly oxidized and the contact is poor, which leads to the failure to work normally, and then the rice is caught.