Error 10 on 850C Display

In plain English

The controller has reached its maximum safe temperature, and the system has cut power to protect it. After a long or hard ride, letting it cool is the fix. If it happens without much riding, a shop should check it.

Work from the top. Steps go from free and easy to shop jobs. Switch the bike off before touching any connector. Tick each step as you go. Your progress is saved on this device.

1. 1Switch off and let it coolFree Turn the system off and give the controller time to cool before riding again.
2. 2Use a lower assist levelFree Drop to a lower assist level, especially on long climbs, so the motor and controller work less hard.
3. 3Make sure air can reach the motor and controllerFree Bags, covers or packed mud around the motor or controller trap heat. Clear them away.
4. 4Check that the wheels spin freelyFree Lift each wheel and spin it by hand. Grinding, dragging or a rubbing brake makes the motor work harder.
5. 5Have the controller testedShop job If the wiring checks out, the controller may be faulty. A shop can test it and replace it if needed.

Parts you might need

As an Amazon Associate I earn from qualifying purchases. These links go straight to Amazon.

Only buy a part if the free steps didn't fix it. Always match the voltage and connector type to your bike.

• Floor pump with gauge

  Soft tires make the motor work harder and cost range.

  Link coming soon