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NordicTrack
Treadmill

Model # NTL24821 Official NordicTrack e 4400 treadmill

Here are the diagrams and repair parts for Official NordicTrack NTL24821 e 4400 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 163 parts  |
Treadmill Walking Belt Alignment Tool (replaces 161927) 128457
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 Safety Key Assembly 160695
Treadmill safety key assembly

Part #160695

This item is not returnable
$5.99
In Stock
Magnet,rnd,m 100498

#7

All parts diagram

Magnet,rnd,m

Part #100498

Replaced by #113842

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Manufacturer substitution
This part replaces 100498. Substitute parts can look different from the original.
This item is not returnable
$2.16
Back Order
Weslo Exercise Equipment Screw 130659

#15

All parts diagram

Weslo exercise equipment screw

Part #130659

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

#11

All parts diagram

Exercise equipment nut

Part #012179

This item is not returnable
$2.16
In Stock
Exerciser Reed Switch And Sensor Wire 185207

#10

All parts diagram

Exerciser reed switch and sensor wire

Part #185207

$9.99
In Stock
Lifestyler Exercise Equipment Screw 146427

#100B

All parts diagram

Lifestyler exercise equipment screw

Part #146427

This item is not returnable
$2.16
In Stock
Exercise Equipment Screw 013576

#45

All parts diagram

Exercise equipment screw

Part #013576

This item is not returnable
$2.16
In Stock
Front Roller/pulley 195283

#8

All parts diagram

Front roller/pulley

Part #195283

Replaced by #204502

?
Manufacturer substitution
This part replaces 195283. Substitute parts can look different from the original.
$72.99
In Stock
Plunger 191592

#NI25

All parts diagram

Plunger

Part #191592

This item is not returnable
$5.99
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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…

Read more
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'…

Read more
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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