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Horizon
Treadmill

Model # RT1 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon RT1 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.

Installation guide

Model diagram and schematic

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ALL PARTS
Showing 10 of 135 parts  |
Switch MC0701002
#P02

Cycle 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

Cycle 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 SZTM71MCB
#M03

Cycle diagram

Pcb assembly

Part #SZTM71MCB

Replaced by #013674-DG

?
Manufacturer substitution
This part replaces SZTM71MCB. Substitute parts can look different from the original.
$416.00 | 
$12.00 OFF Phone Price : $428.00
In Stock
Pcb Assembly SJED08022AA
#M03

Cycle diagram

Pcb assembly

Part #SJED08022AA

Replaced by #013674-DG

?
Manufacturer substitution
This part replaces SJED08022AA. Substitute parts can look different from the original.
$416.00 | 
$12.00 OFF Phone Price : $428.00
In Stock
End Cap MB0609018B
#N61

Cycle diagram

End cap

Part #MB0609018B

Replaced by #000906-B

?
Manufacturer substitution
This part replaces MB0609018B. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Kss Clip MB0905016
#P12

Cycle diagram

Kss clip

Part #MB0905016

Replaced by #001675-00

?
Manufacturer substitution
This part replaces MB0905016. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Belt MD0602023
#R03

Cycle diagram

Belt

Part #MD0602023

Replaced by #1000109577

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Manufacturer substitution
This part replaces MD0602023. Substitute parts can look different from the original.
$57.97
In Stock
Screw MZE0112055
#C26

Cycle diagram

Screw

Part #MZE0112055

Replaced by #004739-00

?
Manufacturer substitution
This part replaces MZE0112055. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Core MC0704005
#M17

Cycle diagram

Core

Part #MC0704005

Replaced by #003386-A

?
Manufacturer substitution
This part replaces MC0704005. Substitute parts can look different from the original.
$12.13
In Stock
Screw MZE0104074
#M46

Cycle diagram

Screw

Part #MZE0104074

Replaced by #004481-Z

?
Manufacturer substitution
This part replaces MZE0104074. 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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