December 21, 2016

How to troubleshoot treadmill problems

By Sears PartsDirect staff
How to troubleshoot treadmill problems

Walking or running your way to fitness is one of the most natural workouts you can do, and a treadmill offers the convenience of doing so in one stationary location from the comfort of home, in all weather conditions and at any time of day. So when there’s a problem with your treadmill, it can really feel like you’re getting nowhere fast. The troubleshooting tips below can help get you and your treadmill moving again in no time.

Treadmill power not turning on

If the treadmill won't turn on, make sure the power cord is plugged in and that you’re using a single-outlet surge suppressor to protect against power surges and electrical interference. Check the safety key, and make sure it did not come loose from the console. You should also check the power switch to see if it's tripped; if so, wait 5 minutes and reset it.

Treadmill shuts off during use

The power switch may have tripped; if it has, wait 5 minutes and then reset it. If the power cord is plugged in properly, unplug it for 5 minutes and then plug it back in. Remove the safety key from console and re-insert it to see if the treadmill will restart.

Treadmill incline not changing

Many incline systems need to be calibrated, but instructions vary by model. Check your owner's manual for specific instructions.

Treadmill walking belt slows when stepped on

Make sure you're using a single-outlet surge suppressor to protect the treadmill against power surges that could cause the belt to slow or even stop suddenly during use. Check the belt to be sure it isn't over-tightened, and keep the belt and board well-lubricated following the recommendations in your owner's manual.

Treadmill walking belt slips or is off center

If the belt has become off-center, your owner's manual will have instructions on how to re-align it. There are also instructions on how to tighten the belt to prevent it from slipping.

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
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.

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

Learn about treadmill repairs that you can easily do yourself.

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

Keep your treadmill in shape by following these tips.