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Horizon
Treadmill

Model # 820T Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon 820T treadmill, as well as links to manuals and error code tables, if available.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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Showing 10 of 111 parts  |
Bottle Set MF0821002A
#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
$16.01 | 
11% OFF Phone Price : $18.01
In Stock
Screw ME0102042
#C06

Treadmill diagram

Screw

Part #ME0102042

Replaced by #004381-00

?
Manufacturer substitution
This part replaces ME0102042. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Screw ME0104085
#R06

Treadmill diagram

Screw

Part #ME0104085

Replaced by #004488-00

?
Manufacturer substitution
This part replaces ME0104085. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
T-wrench MZE1002003
#KIT

Treadmill diagram

T-wrench

Part #MZE1002003

Replaced by #005393-00

?
Manufacturer substitution
This part replaces MZE1002003. Substitute parts can look different from the original.
$8.50
In Stock
Screw MZE0112034
Screw

Part #MZE0112034

Replaced by #004724-00

?
Manufacturer substitution
This part replaces MZE0112034. Substitute parts can look different from the original.
This item is not returnable
$2.88
In Stock
Bolt MZE0112167
#Z07

Treadmill diagram

Bolt

Part #MZE0112167

Replaced by #004796-00

?
Manufacturer substitution
This part replaces MZE0112167. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Screw MZE0112120
#Z11

Treadmill diagram

Screw

Part #MZE0112120

Replaced by #004777-Z

?
Manufacturer substitution
This part replaces MZE0112120. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Sw Cable MC0403003B
#N05

Treadmill diagram

Sw cable

Part #MC0403003B

Replaced by #001956-C

?
Manufacturer substitution
This part replaces MC0403003B. Substitute parts can look different from the original.
This item is not returnable
$5.43
In Stock
Cable MC0503001B
#P13

Treadmill diagram

Cable

Part #MC0503001B

Replaced by #002124-B

?
Manufacturer substitution
This part replaces MC0503001B. Substitute parts can look different from the original.
This item is not returnable
$4.47
In Stock
Breaker MC0702011
#P12

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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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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 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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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…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill walking belt

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 the…

Read more
Repair difficulty
Time required
 45 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

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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