If your washing machine is sparking underneath while spinning, the most likely cause is worn carbon brushes within the motor. This issue is a common problem in washing machines with universal motors.
Understanding Worn Carbon Brushes
Carbon brushes are small, conductive components essential for the operation of your washing machine's motor. They are designed to transfer electrical current from the stationary parts of the motor (stator) to the spinning parts (rotor or commutator). Over time, due to continuous friction and wear, these brushes naturally shorten and wear down.
- How They Cause Sparking: When carbon brushes become excessively worn, they lose proper, consistent contact with the motor's commutator. This poor connection leads to arcing or sparking as electricity attempts to jump the gap between the brush and the commutator. This sparking is often visible from underneath the machine, especially during the spinning cycle when the motor is working hard.
- Other Symptoms: Besides visible sparking, worn brushes can also manifest through other performance issues. You might notice the drum failing to turn, even though the machine fills and empties as normal. Additionally, a distinct "spluttering" or erratic noise coming from the motor area can indicate that the brushes are failing.
