Yes Steve is probably correct, we used to run into this problem fairly frequently. We used to remove the motor and you would have to completely disassemble the pump assembly from the motor, but you can epoxy the fan blade in place on the motor shaft. I never had one fail again after we did this and you can keep using the machine with the loose fan blade. But eventually the blade will get so loose that motor cooling will suffer and the motor may cut out on the overload protector before the full cycle is complete.