CITYSPORTS E06 Error - fix

I have one of these treadmills. A few times it has stopped with the belt unable to move but with the display still working. The last time it displayed an error message: "E06" which means that the motor is overloaded. The first time this happened I thought I was going to have to replace the treadmill. I took it apart for an inspection and noted that the motor has an access port for the brushes. I cleaned the brush and put it back and the treadmill worked again for about 1 month before the same error was thrown. I ordered some replacement brushes and replaced the worn down one - now everything is working just fine.

In this last picture you can see how worn down the old brush was!