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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.

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

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 167 parts  |
Black & Decker Treadmill Washer 014063
#70

Walking belt/console/motor diagram

Black & decker treadmill washer

Part #014063

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
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
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
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
Screw,sbhs,3 161713
#64

Walking belt/console/motor diagram

Screw,sbhs,3

Part #161713

This item is not returnable
$5.99
In Stock
Wire,hrns,14 137381
#50

Walking belt/console/motor diagram

Wire,hrns,14

Part #137381

This item is not returnable
$4.49
In Stock
Warning Decal 165226
#67

Walking belt/console/motor diagram

Warning decal

Part #165226

This item is not returnable
$6.49
In Stock
Wire,jmrp,6" 163036

#NI

All parts diagram

Wire,jmrp,6"

Part #163036

This item is not returnable
$2.16
In Stock

Symptoms for treadmills

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Why does my treadmill's walking belt slow down?

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

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Why is my treadmill's walking belt slipping?

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

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Why is my treadmill's walking belt off center?

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

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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…

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

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

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Why does my treadmill have no display?

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

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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…

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Repair guides for treadmills

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

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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…

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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'…

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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…

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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.

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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.…

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