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Horizon
Treadmill

Model # ALPINE Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon ALPINE 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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ALL PARTS
Showing 10 of 149 parts  |
Socket MC0703023
#P11

Treadmill diagram

Socket

Part #MC0703023

Replaced by #019749-A

?
Manufacturer substitution
This part replaces MC0703023. Substitute parts can look different from the original.
This item is not returnable
$9.62 | 
9% OFF Phone Price : $10.62
In Stock
Switch MC0701002
#P02

Treadmill diagram

Switch

Part #MC0701002

Replaced by #003326-00

?
Manufacturer substitution
This part replaces MC0701002. Substitute parts can look different from the original.
$27.79 | 
18% OFF Phone Price : $33.79
In Stock
Wheel MB0103006B
#L05

Treadmill diagram

Wheel

Part #MB0103006B

Replaced by #000021-B

?
Manufacturer substitution
This part replaces MB0103006B. Substitute parts can look different from the original.
This item is not returnable
$5.25
In Stock
Pcb Assembly MC0201035A
#M03

Treadmill diagram

Pcb assembly

Part #MC0201035A

Replaced by #013674-DG

?
Manufacturer substitution
This part replaces MC0201035A. Substitute parts can look different from the original.
$416.00 | 
$12.00 OFF Phone Price : $428.00
In Stock
Screw ME0107014
#N06

Treadmill diagram

Screw

Part #ME0107014

Replaced by #004616-00

?
Manufacturer substitution
This part replaces ME0107014. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Front Roller SZTM58FRL
#AR1

Treadmill diagram

Front roller

Part #SZTM58FRL

Replaced by #016483-Z

?
Manufacturer substitution
This part replaces SZTM58FRL. Substitute parts can look different from the original.
$104.99
In Stock
Elev Motor MC0102008D
#M02

Treadmill diagram

Elev motor

Part #MC0102008D

Replaced by #012797-00

?
Manufacturer substitution
This part replaces MC0102008D. Substitute parts can look different from the original.
$147.41
In Stock
Shock MJ3011001
#B41

Treadmill diagram

Shock

Part #MJ3011001

Replaced by #008609-00

?
Manufacturer substitution
This part replaces MJ3011001. Substitute parts can look different from the original.
This item is not returnable
$5.93
In Stock
T-wrench MZE1002004

#NI06

All parts diagram

T-wrench

Part #MZE1002004

Replaced by #005394-00

?
Manufacturer substitution
This part replaces MZE1002004. Substitute parts can look different from the original.
This item is not returnable
$5.93
In Stock
Spring MZE1103001
#L15

Treadmill diagram

Spring

Part #MZE1103001

Replaced by #005438-00

?
Manufacturer substitution
This part replaces MZE1103001. Substitute parts can look different from the original.
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…

Read more
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'…

Read more
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…

Read more
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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