Author Topic: RadRunner - Flashing Pedal Assist light led 0 and 2. No pedal assist  (Read 491 times)


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My RadRunner has a problem. There is no pedal assist and 2 leds ( 0 and 2) are blinking simultaneously. I attached a photo showing the controller with the 2 blinking leds. Does anyone know what this means?

John Rose

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Re: RadRunner - Flashing Pedal Assist light led 0 and 2. No pedal assist
« Reply #1 on: December 09, 2023, 08:08:05 PM »
Can you still use the throttle?

Page 43 of the manual for the RadRunner 2 (2021) says:
  • PAS light 0 and 2 flashing / Brake switch fault (or the brake was applied while turning bike on)
See also this post -,9224.msg22250.html#msg22250 - the most interesting thing being:
... Being a technical guy I thought about an what was going on and concluded that the lever adjustment screw under the [brake] lever must be out of adjustment. I backed off the screw 1 turn ccw and everything worked perfectly.  There is a magnetic limit switch in the lever assembly that activates when you pull the lever cutting off power to the motor.
I'm pretty sure that a fault like that would also prevent you from using the throttle, if it thinks you've applied the brakes.

I just made the experiment of switching on the power (button, not the battery keyswitch) with the brake applied on my RadExpand 5, which has a similar display, and it gave me LEDs 0 and 2 blinking. As soon as I let go of the brake handle it went back to normal with just LED 1 lit steadily. If yours persists in blinking 0 & 2, then maybe it's that magnetic limit switch.
RadMini ST 2 / RadExpand 5

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