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Model # CST4 Official Horizon treadmill
Here are the diagrams and repair parts for Official Horizon CST4 treadmill, as well as links to manuals and error code tables, if available.
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CST4 Fitness & Exercise
#P11
Treadmill diagram
Socket
Part #MC0703023
Replaced by #019749-A
?
Manufacturer substitution
This part replaces MC0703023. Substitute parts can look different from the original.
This item is not returnable
$9.62 |
9% OFF Phone Price : $10.62
In Stock
#H26
Treadmill diagram
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
$2.16
In Stock
#NI
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
#P04
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
#NI
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
#C28
Treadmill diagram
Washer
Part #MZE0505038
Replaced by #005198-00
?
Manufacturer substitution
This part replaces MZE0505038. Substitute parts can look different from the original.
This item is not returnable
$4.26
In Stock
#M07
Treadmill diagram
Rubber pad
Part #MB0607001B
Replaced by #056374-AA
?
Manufacturer substitution
This part replaces MB0607001B. Substitute parts can look different from the original.
This item is not returnable
$5.66
In Stock
#N13
Treadmill diagram
Reed switch
Part #MC0403014A
Replaced by #001963-A
?
Manufacturer substitution
This part replaces MC0403014A. Substitute parts can look different from the original.
This item is not returnable
$3.89
In Stock
#B27
Treadmill diagram
Run deck
Part #MD0701042B
Replaced by #004310-C
?
Manufacturer substitution
This part replaces MD0701042B. Substitute parts can look different from the original.
$184.50 |
6% OFF Phone Price : $196.50
In Stock
#N06
Treadmill diagram
Membr key
Part #MC0602195A
This item is not returnable
$16.98
In Stock
Symptoms for treadmills
Choose a symptom to see related treadmill repairs.
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…
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: 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…
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…
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 the…
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'…
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.

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