TRADEMILL START AFTER DISPLAY ERROR3 AND 5SEC OFF

Short in cord, motor, switch, test with ohmmeter

Presumably you mean 'treadmill', not the dark s*tanic variety. This query might be better posted in a forum dealing with exercise machinery

have you tried to make it go faster .the beep could be telling you it is just turned on

What brand is this?

If you push start and the belt does not move then it seems like the is a problem. This problem may be the LCB.

nice .

yes, go to www.fitnessrepairparts.com or www.treadmillpartszone.com

God bless you

treadmill stops when runing

To calibrate the speed follow these steps.
Press stop and speed up and place the safety key in its spot.
release the stop and speed up.
Press stop again. The windows on the console (speed & time) will be all zeros.
Press speed up, the time window will increase. The belt should start to move. Increase this number to 85. This is maximum speed. Adjust the potentiometer to the correct maximum speed. The console will beep until the correct speed is adjusted (+ or - .2mph).
If the machine suddenly goes dead when in use, you may have a static electricity problem.
Check that the ground pin is present on the plug and check your outlet for a proper ground connection.

motor brushes are bad that is why motor can not start itself