Why my treadmils start working and and stops

Hi There, sorry to hear of your troubles. Could you mention what brand and model of treadmill? If this is a Horizon treadmill with E1 error, like models T101 and others from the years 2011-2013, there is one thing you can try. Unplug the treadmill and remove the motor cover to get to the Motor Control Board, or MCB. Be certain the treadmill is unplugged from the wall! Now, look on the MCB on the right side there may be ONE small blue "block" with a tiny screwdriver slot in the center, this is called a potentiometer, and if there is Only One, and a Horizon MCB, you can turn this pot to the right, clockwise, gently until it stops, and then back it off just a hair, reassemble unit, and try treadmill. If this doesn't help, the MCB most likely needs servicing due to failing storage capacitors which get quite hot while in use and can degrade over a few years of service. You can find some help by looking up jatinah electronics, who repairs these modules. Good Luck! ;o)