If the throttle stops working, push on "Mode" and "G" at the same time. This will initiate a countdown from 9 to 1; during the countdown, push the throttle on. After the countdown is over, release the throttle. The display will now show a "G" setting; push on "A" until the setting is "0" or a positive number. The throttle will now be reset. Push "Mode" to shut down and save your settings.