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NordicTrack
Treadmill

Model # NTTL39910 Official NordicTrack vx 900 treadmill

Here are the diagrams and repair parts for Official NordicTrack NTTL39910 vx 900 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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Model diagram and schematic

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ALL PARTS
Showing 10 of 138 parts  |
Treadmill Safety Key Assembly (replaces 201576) 208603

#87

All parts diagram

Treadmill safety key assembly (replaces 201576)

Part #208603

This item is not returnable
$4.69
| 
18% OFF Phone Price : $5.69
In Stock
Treadmill Circuit Breaker, 15-amp (replaces 031103, 127202, 173322) 109382

#15

All parts 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
Weslo Power Socket 109231

#49

All parts diagram

Weslo power socket

Part #109231

This item is not returnable
$6.99
In Stock
Bkt,hood Mtg 168654

#16

All parts diagram

Bkt,hood mtg

Part #168654

$20.99
In Stock
Black & Decker Clamp,8cabl 016057

#107

All parts diagram

Black & decker clamp,8cabl

Part #016057

This item is not returnable
$2.16
In Stock
Nut,push,1/4 012137

#NI20

All parts diagram

Nut,push,1/4

Part #012137

This item is not returnable
$2.16
In Stock
Bkt,elect,pw 157346

#116

All parts diagram

Bkt,elect,pw

Part #157346

This item is not returnable
$5.49
In Stock
Proform Screw,slothf 161922

#14

All parts diagram

Proform screw,slothf

Part #161922

This item is not returnable
$2.16
In Stock
Toyostove Wire,jmpr,8 112083

#NI08

All parts diagram

Toyostove wire,jmpr,8

Part #112083

This item is not returnable
$2.16
In Stock
Toyostove Ground Wire, 8-in (green) 102634

#50

All parts diagram

Toyostove ground wire, 8-in (green)

Part #102634

This item is not returnable
$2.16
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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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