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Horizon
Treadmill

Model # TSC3 Official Horizon elite treadmill

Here are the diagrams and repair parts for Official Horizon TSC3 elite 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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Showing 10 of 55 parts  |
Rail Decal MG0229014C
#Q33

Treadmill assembly diagram

Rail decal

Part #MG0229014C

The manufacturer no longer makes this part, and there's no substitute part

Cons Case MB0617030BB
#N08

Treadmill assembly diagram

Cons case

Part #MB0617030BB

The manufacturer no longer makes this part, and there's no substitute part

Elastomer ME0511005A
#B33

Treadmill assembly diagram

Elastomer

Part #ME0511005A

The manufacturer no longer makes this part, and there's no substitute part

Screw MZE0104077
#R08

Treadmill assembly diagram

Screw

Part #MZE0104077

The manufacturer no longer makes this part, and there's no substitute part

Screw MZE0119002
#Q25

Treadmill assembly diagram

Screw

Part #MZE0119002

The manufacturer no longer makes this part, and there's no substitute part

L Cap Ext MB0238005A
#Q28

Treadmill assembly diagram

L cap ext

Part #MB0238005A

The manufacturer no longer makes this part, and there's no substitute part

Bolt ME0104004
#L19

Treadmill assembly diagram

Bolt

Part #ME0104004

The manufacturer no longer makes this part, and there's no substitute part

Cable MC0504001
#P07

Treadmill assembly diagram

Cable

Part #MC0504001

The manufacturer no longer makes this part, and there's no substitute part

Cover MB0237005FB
#Q05

Treadmill assembly diagram

Cover

Part #MB0237005FB

The manufacturer no longer makes this part, and there's no substitute part

Decal MG0256068A
#V22

Treadmill assembly diagram

Decal

Part #MG0256068A

The manufacturer no longer makes this part, and there's no substitute part

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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