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Rad Power Bikes error 09: Motor phase error
Rad Power Bikes with Bafang hub motor and Rad LCD display (RadRover, RadCity, RadWagon, RadRunner, RadMini)Dealer neededDo not keep riding
A fault on one of the three motor phase wires: open, short or unbalanced. The motor clicks, cogs or stays dead; sometimes a burnt smell. Serious; stop using assist.
Likely causes
- Corroded or burnt pins in the motor connector
- Motor cable damaged at the dropout
- Burnt motor windings after overheating (long hills, heavy cargo)
- Failed controller MOSFET
How to fix Rad Power Bikes error 09
- Unplug the motor connector and look for burnt or corroded phase pins
- Check the cable for damage
- Spin the wheel by hand unplugged: strong cogging or scraping points to the motor
- Contact Rad support; expect a motor or controller replacement
Go to a dealer if: Go to a shop or Rad support immediately; phase faults are not a home repair.
Warranty: Rad Power Bikes gives a 1-year limited warranty on electrical parts (2 years on some newer models and regions); contact Rad support with a video of the error before buying parts.
Typical cost: Controller USD 100-150; hub motor USD 250-400.
Warranty: Rad Power Bikes gives a 1-year limited warranty on electrical parts (2 years on some newer models and regions); contact Rad support with a video of the error before buying parts.
Typical cost: Controller USD 100-150; hub motor USD 250-400.
Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.
Frequently asked
Can I reset Rad error 09?
No.
Can I keep riding?
No, a phase short can destroy the controller.
Warranty?
Motor and controller are core warranty parts.
Related Rad Power Bikes codes
Not an official Rad Power Bikes document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.