Rad Power Bikes RadMission: pedal assist level 2 light flashing, motor won't run (error 24)

Your RadMission powers on, but the level 2 pedal assist light flashes and the motor won't push, or it jerks. On an LED display, a flashing level 2 light is how error 24 shows, and error 24 often points to a motor hall fault (error 24 guide). The RadMission uses an LED display (RadMission connector guide). The short answer: reseat the motor connector, then run the wheel tests and send the results to Rad support. If the plug isn't the problem, it is a motor cable, hall sensor or controller job.

Most likely cause

Hall sensors inside the hub motor tell the controller where the magnets are so it can power the right coil. When one signal drops, the controller loses track of the motor. The signs are jerky starts, stutter at low speed, growling, running only once the wheel is already rolling, behavior that changes when the cable moves, or no motor at all with a normal display (hall sensor guide). Don't replace hall sensors on symptoms alone, because cable, connector and controller faults look the same.

Other causes to rule out

• A wet, dirty or damaged motor connector. Check this first. (Rad error 24 guide)
• A motor cable damaged near the axle or frame, which can break one hall wire. (EM3EV)
• A controller fault that removes the hall supply. (EM3EV)
• All the lights flashing instead of just level 2. That is error 30, a different problem. See RadMission error 30.

How to confirm

1. Turn the bike off, remove the battery and press the power button to drain leftover power.
2. Trace the cable from the rear wheel motor to its connector, at the left chainstay on the RadMission. Keep clear of the brake rotor.
3. Pull the halves straight apart. Look for water, dirt or damage and photograph anything odd.
4. Reconnect with the notches, pins and arrows lined up and press straight together.
5. Refit the battery, lift the rear wheel on a stand or have a helper hold the bike, power on and see whether the throttle spins the wheel. On 2019 and older bikes, press the throttle power button first.
6. Second test: off the stand, in an open area, power on and roll the bike backward while gently twisting the throttle on and off. Note whether the motor gives power.
7. Send your results and photos to Rad Product Support.

Fix options

Reseat the motor connector (easy)

Fixes a plug that has worked loose or picked up grit or water.

Replace the motor wheel (moderate, with support guidance)

A complete motor wheel replaces the hall sensors and cable together and avoids opening the motor. Get the correct motor through Rad Product Support. See fix a flat on a rear hub motor wheel for how rear hub wheels come out.

Repair the motor cable or hall sensors (pro, needs soldering and electrical experience)

This means opening the motor and soldering in new sensors (hall sensor replacement guide). Ask Rad first if the bike is under warranty.

Replace the controller (pro)

If a known good motor still shows the fault, the controller is next.

Parts

• Motor cable and hall sensors, or a complete Hub motor wheel, through Rad support
• E-bike connectors
• E-bike controller (pro only)

When to get a pro

Get help if the connector shows water or burn marks, the cable is damaged, or the light keeps flashing after a clean reseat. See motor cuts out and Rad Power Bikes error codes.

Sources

• error 24 guide, support.radpowerbikes.com
• RadMission connector guide, support.radpowerbikes.com
• hall sensor guide, em3ev.com
• hall sensor replacement guide, EBIKES.CA

Stuck after these checks? Find a shop near you.