Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
NordicTrack
Treadmill

Model # NTHK99902 Official NordicTrack treadmill

Here are the diagrams and repair parts for Official NordicTrack NTHK99902 treadmill, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 174 parts  |
Treadmill Walking Belt Alignment Tool (replaces 161927) 128457
#65

Walking belt/console/motor diagram

Treadmill walking belt alignment tool (replaces 161927)

Part #128457

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Treadmill Circuit Breaker, 15-amp (replaces 031103, 127202, 173322) 109382
#39

Walking belt/console/motor diagram

Treadmill circuit breaker, 15-amp (replaces 031103, 127202, 173322)

Part #109382

This item is not returnable
$9.39 | 
10% OFF Phone Price : $10.39
In Stock
Magnet,rnd,m 100498
#13

Walking belt/console/motor diagram

Magnet,rnd,m

Part #100498

Replaced by #113842

?
Manufacturer substitution
This part replaces 100498. Substitute parts can look different from the original.
This item is not returnable
$2.16
Back Order
Black & Decker Exercise Equipment Reed Switch 157504
#87

Walking belt/console/motor diagram

Black & decker exercise equipment reed switch

Part #157504

This item is not returnable
$10.99
In Stock
Black & Decker Exercise Equipment Screw 013438
#33

Walking belt/console/motor diagram

Black & decker exercise equipment screw

Part #013438

This item is not returnable
$2.16
In Stock
Lifestyler Exercise Equipment Screw 013607
#118

Walking belt/console/motor diagram

Lifestyler exercise equipment screw

Part #013607

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Exercise Equipment Screw 013576
#6

Walking belt/console/motor diagram

Exercise equipment screw

Part #013576

This item is not returnable
$2.16
In Stock
Treadmill Star Washer 163045
#32

Walking belt/console/motor diagram

Treadmill star washer

Part #163045

This item is not returnable
$2.16
In Stock
Uprt,l/r,fog 163701
#23

Walking belt/console/motor diagram

Uprt,l/r,fog

Part #163701

$54.99
In Stock
Treadmill Rear Roller 144809
#103

Walking belt/console/motor diagram

Treadmill rear roller

Part #144809

$46.09 | 
12% OFF Phone Price : $52.09
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

View all

Why does my treadmill's walking belt slow down?

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…

Read more

Why is my treadmill's walking belt slipping?

Main causes: damaged walking belt, improper belt tension, bad roller bearing…

Read more

Why is my treadmill's walking belt off center?

Main causes: rear roller out of alignment, damaged walking belt, bad roller…

Read more

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

Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…

Read more

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

Main causes: faulty sensors, wiring failure, bad control console…

Read more

Why does my treadmill have no display?

Main causes: bad control console, wiring failure, bad motor control board…

Read more

Why won't my treadmill power up?

Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…

Read more

Repair guides for treadmills

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

View all
How to replace a treadmill motor controller

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…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill drive motor

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'…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill walking board

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…

Read more
Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your fitness & exercise

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

View all
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

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

Read more

Parts & More