June 1, 2015

How to replace a treadmill motor controller

By Lyle Weischwill
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.

Quick links
Video
Instructions
Tools required
Work gloves
Phillips screwdriver
Repair difficulty
Time required
15 minutes or less
Repair difficulty
Time required
15 minutes or less
Replacing a motor controller on a treadmill

This video explains how to replace the motor controller on a treadmill.

Instructions

  1. 01.

    Shut off the electricity

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

    PHOTO: Remove the key.

    PHOTO: Remove the key.

  2. 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.

    PHOTO: Remove the motor hood screws.

    PHOTO: Remove the motor hood screws.

    PHOTO: Remove the hood.

    PHOTO: Remove the hood.

  3. 03.

    Remove the motor controller

    Disconnect the wires.

    Remove the mounting screws.

    Remove the motor controller.

    PHOTO: Disconnect the motor controller wires.

    PHOTO: Disconnect the motor controller wires.

    PHOTO: Remove the controller mounting screws.

    PHOTO: Remove the controller mounting screws.

    PHOTO: Remove the motor controller.

    PHOTO: Remove the motor controller.

  4. 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.

    PHOTO: Install the new motor controller.

    PHOTO: Install the new motor controller.

    PHOTO: Reconnect the motor controller wires.

    PHOTO: Reconnect the motor controller wires.

  5. 05.

    Reinstall the motor hood

    Slide the motor hood onto the frame.

    Reinstall the motor hood mounting screws.

    PHOTO: Reinstall the motor hood.

    PHOTO: Reinstall the motor hood.

    PHOTO: Reinstall the hood mounting screws.

    PHOTO: Reinstall the hood mounting screws.

  6. 06.

    Restore power

    Plug the treadmill into the electrical outlet.

Warning: Undertaking repairs or maintenance to appliances or power equipment can be hazardous. Should you choose to undertake repairs or maintenance, you are assuming the risk of injury to your person or property. In an effort to reduce the risk, use the proper tools and safety equipment noted in the applicable guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs or maintenance, however, should only be performed by a qualified technician.
water-filter
Water filters
Find the perfect fit for your refrigerator.
Try our water filter finder

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

April 19, 2023

Why is my treadmill's heart rate sensor not accurate?

By Lyle Weischwill
Main causes: faulty sensors, wiring failure, bad control console
Read more
April 19, 2023

Why does my treadmill have no display?

By Lyle Weischwill
Main causes: bad control console, wiring failure, bad motor control board
Read more
April 19, 2023

Why does my treadmill's walking belt slow down?

By Lyle Weischwill
Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Read more
April 19, 2023

Why is my treadmill's walking belt slipping?

By Wayne Archer
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Read more
April 19, 2023

Why is my treadmill's walking belt off center?

By Lyle Weischwill
Main causes: rear roller out of alignment, damaged walking belt, bad roller
Read more
April 19, 2023

Why won't my treadmill start even though the console display works?

By Lyle Weischwill
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Read more
April 19, 2023

Why won't my treadmill power up?

By Lyle Weischwill
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Read more

Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

June 1, 2015

How to replace a treadmill motor controller

By Lyle Weischwill
How to replace a treadmill motor controller

Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the motor correctly.

Repair difficulty
Time required
 15 minutes or less
June 1, 2015

How to replace a treadmill walking belt

How to replace a treadmill walking belt

A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using these steps.

Repair difficulty
Time required
 45 minutes or less
June 1, 2015

How to replace a treadmill drive motor

By Lyle Weischwill
How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn't run.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all fitness & exercise

Use the advice and tips in these articles and videos to get the most out of your treadmill.

June 29, 2022

Top questions about Sears and Sears PartsDirect

By Lyle Weischwill
Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.

Read more

Parts & More