Brushes can only be the cause if the motor actually uses them. Intermittent failure or loss of rotation justify checking the assembly, but they are not enough to indicate a carbon brush replacement.
Confirm the type of motor
Check the identification and exploded view of the motor and its drive. A brushless motor does not allow this repair, even if a shop offers carbon brushes for other appliances from the same brand.
If all you know is that the drum does not turn, first rule out conditions unrelated to the motor. Do not open the appliance and run it to look for sparks.
What should be inspected
- Wear and condition of the brush contact surface.
- Movement and retention in the brush holder, depending on its design.
- Connections and corresponding spring-loaded parts.
- Condition of the commutator the brushes work against.
Inspection is carried out with the power disconnected and access provided as specified. The minimum length and other discard criteria are specific to that motor; they cannot be determined from a photo or a generic measurement.
When replacement is not enough
If there is damage to the commutator or brush holder, installing a new carbon brush may leave the problem unresolved or damage the replacement part. Compatibility includes the contact shape, orientation, and mounting assembly, not just external dimensions.
Disassembly and the subsequent validation follow the motor’s procedure. If there is an unusual odor or smoke, stop using it and request an inspection; do not keep it running so the new parts can wear in.
Ask for the inspection to include the commutator and housing; a worn brush can coexist with another fault that changes the scope of repair.