WASHING MACHINE

PROBLEM TO BE SOLVED: To provide a washing machine which can perform washing operation as far as possible and mitigate the burden of a user even in the case where the number of rotations of the motor cannot be detected nomally. SOLUTION: In this wahing machine, even in the case where an abnomality in detecting the number of rotations occurs and the number of rotations of the washing and dewatering tank exceeds the normal number of rotations during the intermediate dewatering with a short dewatering time, dewatering is ended before giving a heavy load to the washing machine. Therefore, dewatering operation can be continued. The abnormality detection of the number of rotations is conducted by counting rotation-determination pulses in the disentangling treatment of the rinsing process. If an abnormality occurs in a pulse generator 20, pulses exceeding 30 pulses cannot be counted, and a control portion 18 determines the case as an abnormality in the detection of the number of rotations. Since in the final dewatering with a long dewatering time, a condition in which the number of rotations of the washing and dewatering tank is high continues long and the washing machine threatens to be broken, operation will be stopped and an abnormality warning will be given.