Model #CST4 Official Horizon treadmill
Here are the diagrams and repair parts for Horizon CST4 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.
Showing 10 of 136 parts
Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the motor correctly.
A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using these steps.