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A Treadmill  Powers On But The Motor Does Not Run Repaired

By on October 27, 2020
treadmill board repair

An out of town customer brought me only the board of a treadmill to look at and get it fixed. As I checked the board, I could see that someone tried to get it fixed but for some reason the repair was not successful.

how to fix treadmill

The Mosfet was already taken off board and if you look where the arrow is,

there is a yellow loose connection laying around not connected to anything.

how to repair treadmill

The place of that Mosfets was completely destroyed but the customer brought that shorted part with him when he came to my shop.

how to fix and repair treadmill

The part number IRFP 460 which is well known and found in this kind of device and of course I have plenty of in my shop.


Click on the photo above to access the IRFP460 Datasheet

how to fix and repair treadmill circuit board

That is the metal heat sink that the Mosfet and the diode were sitting against and as you can see, it is very dirty and the thermal paste was dry.

I put the Mosfet back on board, checked everything around that area for bad parts but everything checked fine. I cleaned the metal heat sink, added fresh thermal paste to the parts, tighten up the screws and put everything back together.

Since I do not have the rest of the machine (too big to move) I called the customer and we went together back to his house for testing.  I was not allowed to take photos of the final product but everything was running smoothly and to that I could say…

Mission Accomplished.

This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.

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Note: You can check his previous repair articles in the link below:



  1. Albert van Bemmelen

    October 27, 2020 at 7:33 pm

    Having all kinds of mosfets in stock makes your shop rather unique, and makes your shop the ideal place for any electronic repair engineer to visit for buying components!

    • Waleed Rishmawi

      October 28, 2020 at 5:03 pm

      Albert: that is the idea to keep parts available in the shop so the repair is done smoothly and quickly. have a blessed day

  2. Yogesh Panchal

    October 27, 2020 at 9:52 pm

    waleed, well done!

    • Waleed Rishmawi

      October 28, 2020 at 5:04 pm

      Yogesh: thanks man. have a blessed day

  3. Parasuraman S

    October 27, 2020 at 11:46 pm

    That was a good fix on a treadmill! Many thanks for sharing the experience!

    • Waleed Rishmawi

      October 28, 2020 at 5:05 pm

      Parasuraman: thanks man. it seems like the fault is being repeated on all treadmills i have repaired this past month. have a blessed day

  4. Waleed Rishmawi

    October 28, 2020 at 12:09 am

    Albert: exactly that is the plan. Whatever needed in the shop I keep stock off and keeps the repairs taking place. Have a blessed day

  5. Eric Rice

    October 28, 2020 at 9:15 am

    As a repair shop, I almost always buy an extra or two component/device when I have to order one. This builds up inventory and/or provides an extra just incase the component didn’t fix the issue and damage ocurred at start up.

    • Waleed Rishmawi

      October 28, 2020 at 5:07 pm

      Eric: yes, that is the idea in my shop as well. I buy stocks by the hundreds even. I use that for repair and at the same time sell parts if other repair techs want some. have a blessed day

  6. Charbel

    June 9, 2023 at 4:29 am

    So usually it is the MOSFET that is broken?


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