This kind of breakdown's reason has following three probably 1. Between the gallbladder and the electric hot plate has the sundry goods, in like the grain of rice and so on, causes the gallbladder base and the electric hot plate contact is not good, cannot achieve boils the cooked rice the temperature. Moreover, in the gallbladder base clash distorts, also will present this kind of breakdown. 2. Push-key switch's electricity contact contact is not tight, cause electricity contact heating separation. May adjust the electricity contact reed, causes the electricity contact contact to be close, the breakdown then removes. 3. In the gallbladder either the shell edge distort, enable the gallbladder are not tight with the electric hot plate contact or the contact. After distortion spot repair, places in the outer covering, about rotates several, feels some resistance, namely in the expression the gallbladder base and the electric hot plate contact are good, the breakdown already removed.