Horizon
Treadmill

Model #5.3T Official Horizon treadmill

Here are the diagrams and repair parts for Horizon 53T treadmill, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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.

Showing 10 of 164 parts

Treadmill Walking Belt Lubricant#KIT

Treadmill Diagram

Bottle set

Part #MF0821002A
Replaced by #1000092805
?
Manufacturer substitution
This part replaces MF0821002A. Substitute parts can look different from the original.
This item is not returnable
In Stock
$17.79 | 
10% OFF 
Phone Price: $19.79
Treadmill Power Cord Receptacle

See All Related Diagrams

Power socket

Part #MC0703045A
Replaced by #019749-A
?
Manufacturer substitution
This part replaces MC0703045A. Substitute parts can look different from the original.
This item is not returnable
In Stock
$9.62 | 
10% OFF 
Was: $10.69
Treadmill Rear Roller#AR2

Treadmill Diagram

Rear roller

Part #SM0908015A
Replaced by #014682-B
?
Manufacturer substitution
This part replaces SM0908015A. Substitute parts can look different from the original.
In Stock
$119.99
Treadmill Console Cable#P06

Treadmill Diagram

Console cable

Part #MC0502044A
Replaced by #002103-A
?
Manufacturer substitution
This part replaces MC0502044A. Substitute parts can look different from the original.
In Stock
$25.94
Treadmill Bolt#B36

Treadmill Diagram

Deck bolt

Part #MZE0105005
Replaced by #004562-00
?
Manufacturer substitution
This part replaces MZE0105005. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16
Treadmill On/Off Switch#P02

Treadmill Diagram

Switch

Part #MC0701002
Replaced by #003326-00
?
Manufacturer substitution
This part replaces MC0701002. Substitute parts can look different from the original.
Back Order
$27.79 | 
15% OFF 
Phone Price: $32.79
Handlebar End Cap#Q24

Treadmill Diagram

End cap

Part #MB0609040
Replaced by #000920-00
?
Manufacturer substitution
This part replaces MB0609040. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16
Exercise Equipment Screw#P13

Treadmill Diagram

Screw

Part #MZE0103001
Replaced by #004415-Z
?
Manufacturer substitution
This part replaces MZE0103001. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16
Speed Sensor Fix Plate#B52

Treadmill Diagram

Fix plate

Part #MJ1040005C
Replaced by #007490-C
?
Manufacturer substitution
This part replaces MJ1040005C. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16
Nut#L10

Treadmill Diagram

Nut

Part #MZE0201019
Replaced by #020368-Z
?
Manufacturer substitution
This part replaces MZE0201019. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.16

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: faulty sensors, wiring failure, bad control console
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Main causes: bad control console, wiring failure, bad motor control board
Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
Main causes: damaged walking belt, improper belt tension, bad roller bearing
Main causes: rear roller out of alignment, damaged walking belt, bad roller

Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

June 1, 2015
By Lyle Weischwill
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 motor correctly.

Repair difficulty
Time required
 15 minutes or less
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 these steps.

Repair difficulty
Time required
 45 minutes or less
June 1, 2015
By Lyle Weischwill
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't run.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all fitness & exercise

Use the advice and tips in these articles and videos to get the most out of your treadmill.

June 29, 2022

Top questions about Sears and Sears PartsDirect

By Lyle Weischwill

Get answers to frequently asked questions about Sears and Sears PartsDirect.