Horizon
Treadmill

Model #T81 Horizon treadmill

Here are the diagrams and repair parts for Horizon T81 treadmill, as well as links to manuals and error code tables, if available.


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Showing 10 of 112 parts

Treadmill Motor Control Board

#M03

Frame assy Diagram

$302.43

In Stock

Treadmill On/Off Switch

#P02

Frame assy Diagram

Treadmill on/off switch

Part #003326-00
$25.00

In Stock

Treadmill Nut

#H26

Frame assy Diagram

Treadmill nut

Part #004926-00
This item is not returnable
$2.73

In Stock

Treadmill Safety Key

#NI

Frame assy Diagram

$33.16

In Stock

Treadmill Walking Board Cushion (Orange)

#B57

Frame assy Diagram

$13.89

In Stock

Treadmill Lift Assist Shock Absorber

#B56

Frame assy Diagram

$24.99

In Stock

Treadmill Electronic Control Board Power Wire (Black)

#P20

Frame assy Diagram

Treadmill electronic control board power wire (black)

Part #002508-A
This item is not returnable
$2.19

In Stock

Power Wire (White)

#P21

Frame assy Diagram

Power wire (white)

Part #002509-A
This item is not returnable
$2.19

In Stock

Exercise Equipment Screw

#Z09

Frame assy Diagram

Exercise equipment screw

Part #004859-00
This item is not returnable
$2.16

In Stock

Brass Insert Nut, M8-1.25

#B59

Console assy Diagram

Brass insert nut, m8-1.25

Part #004975-00
This item is not returnable
$2.16

In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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

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 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
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
June 1, 2015
By Lyle Weischwill
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 walking board if it's worn or damaged.

Repair difficulty
Time required
 30 minutes or less

Articles and videos for treadmills

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

January 18, 2016

How to use a multimeter to test electrical parts video

By Sears PartsDirect staff

Learn how to use a multimeter to check for wiring problems in an appliance that's not working

June 29, 2015

Easy DIY treadmill repairs

By Sears PartsDirect staff

Learn about treadmill repairs that you can easily do yourself.

June 1, 2015

Treadmill common questions

By Sears PartsDirect staff

These answers to common questions can help you make the most of your treadmill.