How to replace a treadmill motor controller

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.

Instructions

1. Shut off the electricity

Remove the key and unplug the treadmill’s power cord from the wall outlet.

2. 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.

3. Remove the motor controller

Disconnect the wires.

Remove the mounting screws.

Remove the motor controller.

4. 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.

5. Reinstall the motor hood

Slide the motor hood onto the frame.

Reinstall the motor hood mounting screws.

6. Restore power

Plug the treadmill into the electrical outlet.