Horizon
Treadmill

Model #2.0T Horizon treadmill

Here are the diagrams and repair parts for Horizon 20T treadmill, as well as links to manuals and error code tables, if available.

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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.

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    Showing 10 of 130 parts

    End Cap

    #Q07

    Treadmill assembly Diagram

    End cap

    Part #000388-DB
    ?
    Manufacturer substitution
    This part replaces MB0238004DB. Substitute parts can look different from the original.
    This part replaces MB0238004DB
    $8.15

    In Stock

    Water Bottle

    #NI09

    All parts Diagram

    Water bottle

    Part #000815-A
    ?
    Manufacturer substitution
    This part replaces MB0602015A. Substitute parts can look different from the original.
    This part replaces MB0602015A
    This item is not returnable
    $3.55

    In Stock

    Metric Machine Screw, 8-pack

    #Q11

    Treadmill assembly Diagram

    Metric machine screw, 8-pack

    Part #STD863408
    ?
    Manufacturer substitution
    This part replaces MZE0119002. Substitute parts can look different from the original.
    This part replaces MZE0119002
    This item is not returnable
    $2.71

    In Stock

    Frame

    #H34

    Treadmill assembly Diagram

    Frame

    Part #007585-D
    ?
    Manufacturer substitution
    This part replaces MJ1086010A. Substitute parts can look different from the original.
    This part replaces MJ1086010A
    This item is not returnable
    $5.24

    In Stock

    Metric Machine Screw, 8-pack

    #B35

    Treadmill assembly Diagram

    Metric machine screw, 8-pack

    Part #STD863516
    ?
    Manufacturer substitution
    This part replaces MZE0102026. Substitute parts can look different from the original.
    This part replaces MZE0102026
    This item is not returnable
    $3.06

    In Stock

    Nut

    #B60

    Treadmill assembly Diagram

    Nut

    Part #MZE0203008

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

    Exercise Equipment Screw

    #R04

    Treadmill assembly Diagram

    Exercise equipment screw

    Part #004486-00
    ?
    Manufacturer substitution
    This part replaces MZE0104203. Substitute parts can look different from the original.
    This part replaces MZE0104203
    This item is not returnable
    $3.12

    In Stock

    Sleeve

    #AC01

    Treadmill assembly Diagram

    Sleeve

    Part #014827-AB
    ?
    Manufacturer substitution
    This part replaces SP0003038AB. Substitute parts can look different from the original.
    This part replaces SP0003038AB
    $224.15

    In Stock

    Exercise Equipment Tapping Screw

    #Q21

    Treadmill assembly Diagram

    Exercise equipment tapping screw

    Part #004632-00
    ?
    Manufacturer substitution
    This part replaces MZE0107042. Substitute parts can look different from the original.
    This part replaces MZE0107042
    This item is not returnable
    $2.16

    In Stock

    Washer

    #P18

    Treadmill assembly Diagram

    Washer

    Part #MZE0504014

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

    Symptoms for treadmills

    Choose a symptom to see related treadmill repairs.

    Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
    Main causes: faulty sensors, wiring failure, bad control console
    Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
    Main causes: rear roller out of alignment, damaged walking belt, bad roller
    Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
    Main causes: bad control console, wiring failure, bad motor control board
    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.

    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
    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
    June 1, 2015
    By Lyle Weischwill
    How to replace a treadmill walking board

    A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the walking board if it's worn or damaged.

    Repair difficulty
    Time required
     30 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.

    June 29, 2015

    Easy DIY treadmill repairs

    By Sears PartsDirect staff

    Learn about treadmill repairs that you can easily do yourself.

    June 1, 2015

    Treadmill common questions

    By Sears PartsDirect staff

    These answers to common questions can help you make the most of your treadmill.

    May 10, 2015

    How to maintain a treadmill

    By Sears PartsDirect staff

    Keep your treadmill in shape by following these tips.