The overheating fuse is blown. The key switch cannot be turned off. Solution: Check whether the switch plug, socket and fuse power cord are in good condition. Replace the fuse and check the cause. Check and adjust the electric shock to make it contact well. Avoid bumping the rice cooker to avoid its deformation, especially the bottom of the inner pot and the surface of the electric heating plate, otherwise it will have poor contact due to unevenness and affect the thermal efficiency of the rice cooker. Food should be put into the pot, covered with a lid and then turned on; Be sure to turn off the power before taking out the food to ensure safety. The inner pot can be taken out and connected to the power supply, and the electric heating plate without the inner pot is in danger of overheating and scalding. It is not suitable for cooking acid and alkali foods, and it should not be used in humid and corrosive gas environment to avoid damage to parts and failure. The shell and electric heating plate of the inner pot should not be immersed in water, and the electrical components should be installed in the lower part of the pot. Only after cutting off the power supply can they be wiped clean with a dry cloth. After washing the inner pot, dry the water at the bottom of the pot with a cloth.