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Horizon
Treadmill

Model # RST5.6 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon RST56 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.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 124 parts  |
Breaker MC0702011
#P02

Treadmill 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
Power Socket MC0703047A
#P07

Treadmill diagram

Power socket

Part #MC0703047A

Replaced by #019749-A

?
Manufacturer substitution
This part replaces MC0703047A. Substitute parts can look different from the original.
This item is not returnable
$9.62 | 
9% OFF Phone Price : $10.62
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Sensor MC0510031D
#P08

Treadmill diagram

Sensor

Part #MC0510031D

Replaced by #002248-D

?
Manufacturer substitution
This part replaces MC0510031D. Substitute parts can look different from the original.
$8.16
In Stock
Elastomer MB0502018A
#B76

Treadmill diagram

Elastomer

Part #MB0502018A

Replaced by #018951-A

?
Manufacturer substitution
This part replaces MB0502018A. Substitute parts can look different from the original.
$8.67
In Stock
Rail Lock MB0643001
#B12

Treadmill diagram

Rail lock

Part #MB0643001

Replaced by #001251-F

?
Manufacturer substitution
This part replaces MB0643001. Substitute parts can look different from the original.
This item is not returnable
$3.92
In Stock
Wheel MB0103042C
#K14

Treadmill diagram

Wheel

Part #MB0103042C

Replaced by #000038-C

?
Manufacturer substitution
This part replaces MB0103042C. Substitute parts can look different from the original.
This item is not returnable
$3.58
In Stock
End Cap MB0238049BA
#Q04

Treadmill diagram

End cap

Part #MB0238049BA

Replaced by #056276-CA

?
Manufacturer substitution
This part replaces MB0238049BA. Substitute parts can look different from the original.
$48.99
In Stock
Cap Top, L MB0204043AA
#Q16A

Treadmill diagram

Cap top, l

Part #MB0204043AA

Replaced by #056247-AA

?
Manufacturer substitution
This part replaces MB0204043AA. Substitute parts can look different from the original.
This item is not returnable
$7.13
In Stock
Screw ME0107010
#B62

Treadmill diagram

Screw

Part #ME0107010

Replaced by #004613-00

?
Manufacturer substitution
This part replaces ME0107010. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Lock Latch MJ1027035B
#B65

Treadmill diagram

Lock latch

Part #MJ1027035B

Replaced by #064596-AA

?
Manufacturer substitution
This part replaces MJ1027035B. Substitute parts can look different from the original.
$12.13
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…

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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'…

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…

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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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