DIY treadmill repair

Your treadmill lets you get a cardiovascular workout at any time of day, regardless of the weather. And you can easily change your speed or incline. However, your fitness routine can suffer if your machine isn't working correctly. If you're having problems with your treadmill—maybe it won't power up or the walking belt keeps slipping—try the troubleshooting guidance below to help you narrow down the cause.

Then use our DIY treadmill repair guides for step-by-step instructions to fix the problem. For additional troubleshooting tips and advice on getting the most out of your treadmill, check out our articles page. To find the owner’s manual or a complete list of replacement parts for your treadmill, search for your model number.

Treadmills
Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Main causes: bad control console, wiring failure, bad motor control board
Main causes: rear roller out of alignment, damaged walking belt, bad roller
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Main causes: faulty sensors, wiring failure, bad control console
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Repair guides for treadmills

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

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
By Lyle Weischwill
How to replace a treadmill walking board

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.

Repair difficulty
Time required
 30 minutes or less
June 1, 2015
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
June 1, 2015
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
Articles and videos for treadmills

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

December 21, 2016
How to troubleshoot treadmill problems
By Sears PartsDirect staff

See what to check if you're having a problem with your treadmill, and what you can do to fix it.

January 18, 2016
How to use a multimeter to test electrical parts video
By Sears PartsDirect staff

Learn how to use a multimeter to check for wiring problems in an appliance that's not working

June 29, 2015
Easy DIY treadmill repairs
By Sears PartsDirect staff

Learn about treadmill repairs that you can easily do yourself.

June 1, 2015
Treadmill common questions
By Sears PartsDirect staff

These answers to common questions can help you make the most of your treadmill.

May 10, 2015
How to maintain a treadmill
By Sears PartsDirect staff

Keep your treadmill in shape by following these tips.