Horizon
Treadmill

Model #T73 Official Horizon treadmill

Here are the diagrams and repair parts for Horizon T73 treadmill, as well as links to manuals and error code tables, if available.

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Owner’s manual

Showing 10 of 153 parts

Treadmill Motor Control Board (replaces SJED08089ED)#M41

Treadmill Diagram

Pcb assembly

Part #SJED08089ED
Replaced by #032669-IF
?
Manufacturer substitution
This part replaces SJED08089ED. Substitute parts can look different from the original.
This item is not returnable
In Stock
$252.71 | 
$10.00 OFF 
Phone Price: $262.71
Treadmill Nut#D10

Treadmill Diagram

Nut

Part #ME0204008AB
Replaced by #004926-00
?
Manufacturer substitution
This part replaces ME0204008AB. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.73
Treadmill Nut

See All Related Diagrams

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
In Stock
$2.73
Treadmill Circuit Breaker (replaces 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.
In Stock
$22.76
Treadmill Safety Key#N25

Treadmill Diagram

Safety key

Part #S140209001
Replaced by #082397
?
Manufacturer substitution
This part replaces S140209001. Substitute parts can look different from the original.
In Stock
$41.19 | 
11% OFF 
Phone Price: $46.19
Exercise Equipment Nut#K18

Treadmill Diagram

Nut

Part #MZE0204027
Replaced by #004934-00
?
Manufacturer substitution
This part replaces MZE0204027. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.26
Treadmill Drive Motor#M01

Treadmill Diagram

Drive mtr

Part #SZTM114MTR
Replaced by #1000110344
?
Manufacturer substitution
This part replaces SZTM114MTR. Substitute parts can look different from the original.
In Stock
$398.59 | 
$10.00 OFF 
Phone Price: $408.59
Treadmill Walking Board Cushion, Center (Blue)#B58

Treadmill Diagram

Elastomer

Part #MB0502017D
Replaced by #000768-D
?
Manufacturer substitution
This part replaces MB0502017D. Substitute parts can look different from the original.
In Stock
$14.60
Exercise Equipment Nut#M22

Treadmill Diagram

Nut

Part #MZE0204013
Replaced by #004934-00
?
Manufacturer substitution
This part replaces MZE0204013. Substitute parts can look different from the original.
This item is not returnable
In Stock
$2.26
Treadmill Walking Board Cushion (Orange)#B57

Treadmill Diagram

Elastomer

Part #MB0502016D
Replaced by #000767-D
?
Manufacturer substitution
This part replaces MB0502016D. Substitute parts can look different from the original.
In Stock
$17.69 | 
10% OFF 
Phone Price: $19.69

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: faulty sensors, wiring failure, bad control console
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
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board

Repair guides for treadmills

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

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
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

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