Horizon
Treadmill

Model #T54 Horizon treadmill

Here are the diagrams and repair parts for Horizon T54 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.

    Showing 10 of 125 parts

    Treadmill Nut

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    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 Reed Switch

    #NI02

    All parts Diagram

    Sensor

    Part #MC0510093B
    Replaced by #002248-D
    ?
    Manufacturer substitution
    This part replaces MC0510093B. Substitute parts can look different from the original.
    In Stock
    $8.16
    Treadmill Safety Key Assembly#N24

    Horizon treadmill Diagram

    Safety key

    Part #S140115001
    Replaced by #016167-Z
    ?
    Manufacturer substitution
    This part replaces S140115001. Substitute parts can look different from the original.
    In Stock
    $28.05
    Treadmill Power Cable#P10

    Horizon treadmill Diagram

    Cable

    Part #MC0525034B
    Replaced by #002514-B
    ?
    Manufacturer substitution
    This part replaces MC0525034B. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    El Paper#N12

    Horizon treadmill Diagram

    El paper

    Part #MC0755002A
    Replaced by #003583-A
    ?
    Manufacturer substitution
    This part replaces MC0755002A. Substitute parts can look different from the original.
    In Stock
    $9.67
    Washer

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    Washer

    Part #MZE0502025

    The manufacturer no longer makes this part, and there's no substitute part

    Exercise Equipment Screw

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    Screw

    Part #MZE0107023
    Replaced by #004620-00
    ?
    Manufacturer substitution
    This part replaces MZE0107023. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Treadmill Nut#C23

    Horizon treadmill Diagram

    Nut

    Part #ME0204030
    Replaced by #004945-00
    ?
    Manufacturer substitution
    This part replaces ME0204030. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Grip Pulse#N26

    Horizon treadmill Diagram

    Grip pulse

    Part #MC0712021B
    Replaced by #003432-B
    ?
    Manufacturer substitution
    This part replaces MC0712021B. Substitute parts can look different from the original.
    In Stock
    $22.88
    Exercise Equipment Nut#M12

    Horizon 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

    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 for treadmills

    Use the advice and tips in these articles and videos to get the most out of your treadmill.

    December 21, 2016

    How to troubleshoot treadmill problems

    By Sears PartsDirect staff

    See what to check if you're having a problem with your treadmill, and what you can do to fix it.

    May 10, 2015

    How to maintain a treadmill

    By Sears PartsDirect staff

    Keep your treadmill in shape by following these tips.

    January 1, 1970

    How to tell if a fuse is blown

    By Lyle Weischwill

    Learn how to tell whether a fuse is blown