Weslo
Treadmill

Model #WLTL421040 Official Weslo cardiopacer treadmill

Here are the diagrams and repair parts for Weslo WLTL421040 cardiopacer 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

    Showing 10 of 96 parts

    Treadmill Safety Key

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    Treadmill safety key

    Part #119038
    BEST SELLER
    This item is not returnable
    In Stock
    $3.49 | 
    22% OFF 
    Phone Price: $4.49
    Treadmill Walking Belt Alignment Tool

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    Treadmill walking belt alignment tool

    Part #128457
    BEST SELLER
    This item is not returnable
    In Stock
    $2.49 | 
    29% OFF 
    Phone Price: $3.49
    Treadmill Washer#66

    Walking belt/rails/console/motor Diagram

    Treadmill washer

    Part #014063
    This item is not returnable
    In Stock
    $1.49 | 
    40% OFF 
    Phone Price: $2.49
    Exercise Equipment Rubber Pad

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    Exercise equipment rubber pad

    Part #157600
    This item is not returnable
    In Stock
    $2.16
    Belt Guide#27

    Walking belt/rails/console/motor Diagram

    Belt guide

    Part #198640
    This item is not returnable
    In Stock
    $2.16
    Treadmill Star Washer

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    Treadmill star washer

    Part #163045
    This item is not returnable
    In Stock
    $2.16
    Exercise Equipment Retainer Clip#48

    Walking belt/rails/console/motor Diagram

    Exercise equipment retainer clip

    Part #131090
    This item is not returnable
    In Stock
    $2.16
    Exercise Equipment Screw, 5/16-18 x 3-in

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    Screw.sbhs,g

    Part #164321
    Replaced by #174797
    ?
    Manufacturer substitution
    This part replaces 164321. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Treadmill Maintenance Kit

    #NI36

    All parts Diagram

    Kit,maintena

    Part #169743
    Replaced by #356520
    ?
    Manufacturer substitution
    This part replaces 169743. Substitute parts can look different from the original.
    In Stock
    $72.26
    Nut-sert,hex

    #NI03

    All parts Diagram

    Nut-sert,hex

    Part #125719
    This item is not returnable
    In Stock
    $3.49

    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 Lyle Weischwill

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