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NordicTrack
Treadmill

Model # NTTL18900 Official NordicTrack apex 4100i treadmill

Here are the diagrams and repair parts for Official NordicTrack NTTL18900 apex 4100i treadmill, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 190 parts  |
Treadmill Circuit Breaker, 15-amp (replaces 031103, 127202, 173322) 109382

#55

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
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Treadmill Safety Key Assembly 160695

#82

All parts diagram

Treadmill safety key assembly

Part #160695

This item is not returnable
$5.99
In Stock
Toyostove Exercise Equipment Rubber Pad 157600

#108

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Toyostove exercise equipment rubber pad

Part #157600

This item is not returnable
$2.16
In Stock
Black & Decker Treadmill Nut 119425

#40

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Black & decker treadmill nut

Part #119425

This item is not returnable
$2.16
In Stock
Exercise Equipment Screw 013544

#114

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Exercise equipment screw

Part #013544

This item is not returnable
$4.99
In Stock
Audio Wire 167079

#98

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Audio wire

Part #167079

$15.99
In Stock
Deck Rail Washer 129496

#NI

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Deck rail washer

Part #129496

This item is not returnable
$2.16
In Stock
Exercise Equipment Nut 012179

#77

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Exercise equipment nut

Part #012179

This item is not returnable
$2.16
In Stock
Grd,edge,str 163387

#116

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Grd,edge,str

Part #163387

This item is not returnable
$6.49
In Stock
Image Wire,14awg,2 103824

#NI

All parts diagram

Image wire,14awg,2

Part #103824

This item is not returnable
$3.99
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

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