I just experienced this same problem. Found the problem after further examination. The motor housing does not secure the motor over time this is due to the fact that this housing is very cheaply engineers and cause the motor eventualy to rotate in the housing. this can result in an potential electric shock to the operator as the wires twist each time the motor rotate. I found that the wires were all twisted so tightly that one of them broke the connection. The motor is only held in place by 4 plastic fins in the cover. These fins tend to brake and will cause the motor to rotate. You will discover the when you remove all the screws from the plastic motor housing. Look for twisted wires near the motor. Be sure that the device is disconnected from the power source.
Gary, May 2009
