Troubleshooting

Front wheel contacts toes/pedals when turning

 * Front fork was turned backwards when the handlebars were installed. Turn front fork forward and reinstall handlebars. The front brake will be on the left side of the bike when the fork and handlebars are oriented correctly.

Battery and controller are powered up, but won't go

 * Check the brake cables for proper adjustment and brake alignment. If the cable is out of place, it can trigger the brake lever cutoff, which disables the controller output. This has been the most common problem.

Charger doesn't charge

 * Ensure battery rocker switch is turned off
 * Unplug it from the wall, and plug it back in while still attached to the battery
 * take battery out of bike, plug charger into battery first, then plug into wall. put battery in vat of ice cream to cool it down while it charges

Battery cradle overheating

 * Check the nuts that connect the battery cables to the cradle; tighten if necessary

Disc brakes rub
[Source: Philip Hillis, Sondors Storm Owners Group, Facebook]
 * This is a common problem on a new bike. The caliper needs adjusting.