Horizon
Treadmill

Model #DT680 Horizon treadmill

Here are the diagrams and repair parts for Horizon DT680 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.

Owner’s manual

    Showing 10 of 150 parts

    Treadmill Walking Belt Lubricant#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
    In Stock
    $17.80
    Treadmill Nut

    See All Related Diagrams

    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 Drive Motor#M01

    Treadmill Diagram

    Drive mtr

    Part #SZTM116MTR
    Replaced by #016172-Z
    ?
    Manufacturer substitution
    This part replaces SZTM116MTR. Substitute parts can look different from the original.
    In Stock
    $289.87
    Treadmill Reed Switch#P14

    Treadmill Diagram

    Sensor

    Part #MC0510031D
    Replaced by #002248-D
    ?
    Manufacturer substitution
    This part replaces MC0510031D. Substitute parts can look different from the original.
    In Stock
    $8.16
    Treadmill Drive Belt#R03

    Treadmill Diagram

    Belt

    Part #MD0602023
    Replaced by #1000109577
    ?
    Manufacturer substitution
    This part replaces MD0602023. Substitute parts can look different from the original.
    In Stock
    $57.97
    Treadmill Safety Key Assembly#N33

    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 Walking Board#B27

    Treadmill Diagram

    Run deck

    Part #MD0701043B
    Replaced by #004311-C
    ?
    Manufacturer substitution
    This part replaces MD0701043B. Substitute parts can look different from the original.
    In Stock
    $188.42
    Wheel

    See All Related Diagrams

    Wheel

    Part #MB0103040CA
    Replaced by #000037-CA
    ?
    Manufacturer substitution
    This part replaces MB0103040CA. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.26
    Exercise Equipment Screw#M10

    Treadmill Diagram

    Screw

    Part #ME0106026B
    Replaced by #004595-00
    ?
    Manufacturer substitution
    This part replaces ME0106026B. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.40
    Screw#M14

    Treadmill Diagram

    Screw

    Part #MZE0106018
    Replaced by #004590-Z
    ?
    Manufacturer substitution
    This part replaces MZE0106018. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16

    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 common to all fitness & exercise

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

    June 29, 2022

    Top questions about Sears and Sears PartsDirect

    By Sears PartsDirect staff

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