Horizon
Treadmill

Model #T805 Official Horizon treadmill

Here are the diagrams and repair parts for Horizon T805 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 127 parts

    Treadmill Walking Belt Lubricant#NI

    Treadmill assy 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
    $17.79 | 
    10% OFF 
    Phone Price: $19.79
    Treadmill Nut#M08

    Treadmill assy Diagram

    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 Motor Control Board#M03

    Treadmill assy Diagram

    Controller

    Part #SZTM113MCB
    Replaced by #032669-IF
    ?
    Manufacturer substitution
    This part replaces SZTM113MCB. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $252.71 | 
    10% OFF 
    Was: $280.79
    Treadmill Circuit Breaker#P04

    Treadmill assy Diagram

    Breaker

    Part #MC0702011
    Replaced by #003346-00
    ?
    Manufacturer substitution
    This part replaces MC0702011. Substitute parts can look different from the original.
    In Stock
    $22.76
    Treadmill Walking Board Cushion, Center (Blue)#B58

    Treadmill assy Diagram

    Elastomer

    Part #MB0502017D
    Replaced by #000768-D
    ?
    Manufacturer substitution
    This part replaces MB0502017D. Substitute parts can look different from the original.
    In Stock
    $14.60
    Hex Wrench, 6-mm#NI

    Treadmill assy Diagram

    T-wrench

    Part #MZE1002003
    Replaced by #005393-00
    ?
    Manufacturer substitution
    This part replaces MZE1002003. Substitute parts can look different from the original.
    In Stock
    $8.50
    Treadmill Bolt#H14

    Treadmill assy Diagram

    Bolt

    Part #MJ3022015B
    Replaced by #008628-B
    ?
    Manufacturer substitution
    This part replaces MJ3022015B. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $3.55
    Treadmill Drive Belt#R03

    Treadmill assy Diagram

    Drive belt

    Part #MD0602001
    Replaced by #1000109551
    ?
    Manufacturer substitution
    This part replaces MD0602001. Substitute parts can look different from the original.
    In Stock
    $55.69 | 
    8% OFF 
    Phone Price: $60.69
    Treadmill Walking Board Cushion (Orange)#B57

    Treadmill assy Diagram

    Elastomer

    Part #MB0502016D
    Replaced by #000767-D
    ?
    Manufacturer substitution
    This part replaces MB0502016D. Substitute parts can look different from the original.
    In Stock
    $17.69 | 
    10% OFF 
    Phone Price: $19.69
    Exercise Equipment Nut#M12

    Treadmill assy 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 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.