I currently own a Trimline Treadmill that has a Nautilus Motor Board. When I try to start the treadmill the belt won't move but the time and speed do. I tried changing the fuse but that didn't work. I also noticed that the red light which is located to the bottom left of the motor board is not lit. I want to make sure it is the motor board before purchasing another one. HELP

SOURCE: proform treadmill 580si motor is not working

Recheck your wiring and check your ground. If all that checks out then triple check your control board. Also the motor SHOULD have a reset button make sure that the button is not out and it is fully pushed in

SOURCE: Treadmill motor not coming on, belt not moving

most likely cause is a burnt out motor controller, you'll need to replace it.

SOURCE: Your Problem: Spirit Treadmill motor will not turn on

I'd start by attaching a voltmeter across the motor contacts to see if you get any voltage when the unit is turned on. It's probably an AC motor but I'd check the label to be sure. If you get voltage but no turning either the motor or a startup capacitor is bad. If this is the case try moving the tread by hand with the unit turned on. If it moves on it's own after you start it moving then the start up cap needs to be replaced. Otherwise it may be time to replace the motor. If you don't have voltage across the motor contacts when the machine is turned on, I'd unplug the unit and trace the lines back from the motor to somewhere on the PC board. I'm guessing there's probably a relay on the PC board that controls the motor. I'd use an ohm meter to make sure the relay coil hasn't turned into an open circuit. Next I'd put a voltmeter across the relay coil, plug the unit back in, and turn the treadmill on and off several times. Ideally you should see the voltage across the relay coil go up and down as you turn the treadmill on and off. This voltage could be AC or DC depending on the type of relay used. If you get the proper voltage across the coil but the relay contacts aren’t' opening and closing to provide power to the motor then you need to replace the relay. If you don't get the proper voltage across the relay coil the problem is further back on the PC board.

SOURCE: Life Fitness T3 treadmill won't turn on. Power

Could be. If you had to take it apart, I would definately check the wire harness connection. Also if there are bolts that were removed, check to make sure none of those pinched the harness when reassembling.

SOURCE: My Healthrider 400se Treadmill slows down after 10seconds

Use only a single-outlet surge suppressor that is
UL 1449 listed as a transient voltage surge suppressor
(TVSS). The surge suppressor must have a
UL suppressed voltage rating of 400 volts or less
and a minimum surge dissipation of 450 joules.
The surge suppressor must be electrically rated
for 120 volts AC and 15 amps. There must be a
monitoring light on the surge suppressor to indicate
whether it is functioning properly. Failure to
use a properly functioning surge suppressor could
result in damage to the control system of the
treadmill. If the control system is damaged, the
walking belt may change speed or stop unexpectedly,
which may result in a fall and serious injury.