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NordicTrack
Treadmill

Model # NTTL99120 Official NordicTrack c1800s treadmill

Here are the diagrams and repair parts for Official NordicTrack NTTL99120 c1800s treadmill, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 156 parts  |
Black & Decker Treadmill Power Cord (replaces 031033, 031143, 031147, 247991) 031229
#42

Console/handrail/hood-motor diagram

Black & decker treadmill power cord (replaces 031033, 031143, 031147, 247991)

Part #031229

$11.39 | 
15% OFF Phone Price : $13.39
In Stock
Treadmill Rear Roller 144809
#62

Console/handrail/hood-motor diagram

Treadmill rear roller

Part #144809

$46.09 | 
12% OFF Phone Price : $52.09
In Stock
Black & Decker Treadmill Washer 014063
#34

Console/handrail/hood-motor diagram

Black & decker treadmill washer

Part #014063

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Toyostove Exercise Equipment Rubber Pad 157600
Toyostove exercise equipment rubber pad

Part #157600

This item is not returnable
$2.16
In Stock
Black & Decker Power Cord Grommet 173169
#109

Console/handrail/hood-motor diagram

Black & decker power cord grommet

Part #173169

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Nut 012149
#20

Console/handrail/hood-motor diagram

Black & decker exercise equipment nut

Part #012149

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Screw 154848
#90

Console/handrail/hood-motor diagram

Black & decker exercise equipment screw

Part #154848

This item is not returnable
$2.16
In Stock
Wire,hrns,mt 157365
#31

Console/handrail/hood-motor diagram

Wire,hrns,mt

Part #157365

This item is not returnable
$5.99
In Stock
Sprng,leaf,a 193339
#114

Console/handrail/hood-motor diagram

Sprng,leaf,a

Part #193339

$33.49
In Stock
Wire,gnd,7.0 155623

#NI06

All parts diagram

Wire,gnd,7.0

Part #155623

This item is not returnable
$2.99
In Stock

Symptoms for treadmills

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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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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 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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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…

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

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 the…

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Repair difficulty
Time required
 45 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

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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