Horizon
Treadmill

Model #T84 Official Horizon treadmill

Here are the diagrams and repair parts for Horizon T84 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.

Owner’s manual

Showing 10 of 118 parts

Treadmill Washer#L12

Frame assy Diagram

Treadmill washer

Part #005005-00
This item is not returnable
In Stock
$2.16
Treadmill Bolt#B36

Belt assy Diagram

Treadmill bolt

Part #004562-00
This item is not returnable
In Stock
$2.16
Treadmill Power Cord#P07

Frame assy Diagram

Treadmill power cord

Part #019370-A
In Stock
$53.09 | 
10% OFF 
Was: $58.99
Receiver#NI

Frame assy Diagram

Receiver

Part #024271-A
In Stock
$30.03
Cover#Q07

Frame assy Diagram

Cover

Part #076798
In Stock
$9.87
Treadmill Rear Roller#AR2

Belt assy Diagram

Treadmill rear roller

Part #014683-B
In Stock
$159.39 | 
6% OFF 
Phone Price: $169.39
Latch#H31

Frame assy Diagram

Latch

Part #079406
In Stock
$11.72
Console#AC1

Frame assy Diagram

Console

Part #076825
In Stock
$121.34
Exercise Equipment Screw#Q31

Belt assy Diagram

Exercise equipment screw

Part #004867-A
This item is not returnable
In Stock
$2.16
Link Arm#AH4

Frame assy Diagram

Link arm

Part #079408
In Stock
$23.68

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.