This DIY repair guide explains how to replace the motor controller on a treadmill. The motor controller runs the motor at the speed you select at the console. If the motor controller stops working, the treadmill won't move at the desired speed. Replace the motor controller with the manufacturer-approved replacement part.
This procedure works for common ProForm, Weslo, Weider, Lifestyler, NordicTrack, Sole and Horizon treadmills.
This video explains how to replace the motor controller on a treadmill.
Instructions
01.
Shut off the electricity
Remove the key and unplug the treadmill’s power cord from the wall outlet.
Remove the key.
02.
Remove the motor hood
Remove the screws securing the motor hood to the belly pan.
Pull the motor hood forward and remove it from the treadmill frame.
Remove the motor hood screws.
Remove the hood.
03.
Remove the motor controller
Disconnect the wires.
Remove the mounting screws.
Remove the motor controller.
Disconnect the motor controller wires.
Remove the controller mounting screws.
Remove the motor controller.
04.
Install the new motor controller
Position the new motor controller on the frame.
Reinstall the motor controller mounting screws.
Reconnect the wires to the new motor controller.
Install the new motor controller.
Reconnect the motor controller wires.
05.
Reinstall the motor hood
Slide the motor hood onto the frame.
Reinstall the motor hood mounting screws.
Reinstall the motor hood.
Reinstall the hood mounting screws.
06.
Restore power
Plug the treadmill into the electrical outlet.
A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using these steps.
A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the walking board if it's worn or damaged.
A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn't run.
See what to check if you're having a problem with your treadmill, and what you can do to fix it.
Learn about treadmill repairs that you can easily do yourself.
Keep your treadmill in shape by following these tips.