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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  |
Nut MZE0204005
Nut

Part #MZE0204005

Replaced by #004926-00

?
Manufacturer substitution
This part replaces MZE0204005. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Breaker MC0702011
#P04

Cycle diagram

Breaker

Part #MC0702011

Replaced by #003346-00

?
Manufacturer substitution
This part replaces MC0702011. Substitute parts can look different from the original.
$14.80
In Stock
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 | 
15% OFF Phone Price : $32.79
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 | 
$10.00 OFF Phone Price : $426.00
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 | 
$10.00 OFF Phone Price : $426.00
In Stock
Belt MD0602023
#R03

Cycle diagram

Belt

Part #MD0602023

Replaced by #1000109577

?
Manufacturer substitution
This part replaces MD0602023. Substitute parts can look different from the original.
$57.97
In Stock
Motor Set SZTM61MTR
#M01

Cycle diagram

Motor set

Part #SZTM61MTR

Replaced by #016507-Z

?
Manufacturer substitution
This part replaces SZTM61MTR. Substitute parts can look different from the original.
$271.92
In Stock
Spring MZE1117004D
#H30

Cycle diagram

Spring

Part #MZE1117004D

Replaced by #005475-D

?
Manufacturer substitution
This part replaces MZE1117004D. Substitute parts can look different from the original.
This item is not returnable
$3.05
In Stock
Screw MZE0107023
Screw

Part #MZE0107023

Replaced by #004620-00

?
Manufacturer substitution
This part replaces MZE0107023. Substitute parts can look different from the original.
This item is not returnable
$2.16
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

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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