Installing a new MOSFET may not fix your problem. Other issues may be the cause of the malfunction, Check that the running belt moves freely, and nothing is binding, and all other connections are good and replace any other parts that may be suspect. I included a trouble shooting flow chart in this video reed through that and see if you have any other issues. Beond that I can't help without testing all other components.
CAN you please help I did change that part and now it's not even doing that short run before turning off But lights go on and Treadmil thinks it's running
Big Thanks!! You saved me $200 worth of controller. I had the exact same problem and with your instructions it made so easy to replace even for newbie like me. I had MC2000 board and never had any experience with soldering. Following your recommendation only cost $8 USD.
So random that I found this video, but I removed the mosfet and it's definitely busted. I get the new one in tomorrow. You just saved my around $200 for a new board! Thank you so much.
Thanks for posting this video. We just bought a Treadmill from down the street for $80 which according to the previous owner was slipping. I noticed the motor belt was loose and figured I could fix it but very soon after adjusting the motor tension the unit died like the one in your video. I think the previous owners tried to solve the slipping by tensioning the running belt instead of the motor belt and once I adjusted the motor belt the whole assembly was far too tight and killed the board. We are going to do a service on the machine and I will try your fix on the board and I will update you! Thanks again!
Like many others, found this video with the exact same problem and it wound being exactly as you showed. First time properly soldering a circuit board, but it fixed the problem and saved us a ton of money. Appreciate the video!
Thanks!!! That was exactly the problem I had. Excellent instructions, easy to follow and so precise. $5 CAD part from my local electronics store to fix.
Thanks, I followed your lead and after researching found my 250 N could be replaced by a large series of units the difference being able to handle higher amperage and heat dissipation. As you point out, a non lubed belt can cause the initial failure but so can heat. As a PC tech I can tell you the heatsink setup on Nordictrack is attempting to get to 3rd rate. I replaced a 250 with a 260. If course the Mosfet acts as a fuse to some degree if too much amperage is pulled and using a higher amperage Mosfet could cause other component failure. I use PC CPU heatsink paste with the thermal pad and get great results. I am planning on putting together a fixit kit, probably Mosfet, Diode, and capacitors in order to not only fix but upgrade the board for the long term. I am also planning on trying to add a PWM driven fan. Any suggestions greatly appreciated.
I have the proform perfomance 800i that had the same symptom. Ran fast and slows to a stop. Turns out, the 1500uf 200v fujicon filter capacitor is dead along with another 2200uf 16v dead capacitor. The mosfet IRF250M also looked burned. I bought the replacements and will see if that solves the problem later when digikey gets them to me. This boards electrolytic capacitors “fujicon” seem cheap.
Thanks for the video. I was able to diagnose and fix the motor controller with your help. Cost of repairs wes $10 for the transistor including shipping.
Thanks! this fixed my treadmill! It was not easy to remove the mosfet for me. If i had a 3 tipped soldering iron, i think it would have been easier :) Every time i had one terminal liquid, I obviously couldn't wiggle it out since the others were still solid, but by the time i melted the other two, the first one had set up. I really needed a solder sucker, or whatever would help me remove the solder from each post separately... But that's my fault. Amazon had a two pack of Mosfets for $10.
just tried it this morning and it is broken again. I don't know if i did it. I was showing my daughter how to use it. I told her it shouldn't start in "6 mph" and assumed that was the case. But, it started fast for a split second and shut off. Now it does it every time i hit "start". So maybe i fried the MOSFET? or something else is wrong that is frying the MOSFET. I would have thought that the electronics would only allow a ramp up to 6 if you try to start at 6.
Thanks man! Your tip helped fixing my ProForm treadmill and saved me $200! My board is a little different from yours and it has an IRFP250M transistor rather than IRFP250N. But I was able to find a new IRFP250M and replaced it. Now my treadmill works like new.
Thank you so much! I just found this video tonight and tomorrow is an early Monday morning. I will thank you again after I complete the job. Appreciate your help!
@@htconesv897 That's interesting. Did you replace with same model part? "N" not "P" type MOSFET correct? Could be a signal error from the control console. Check the statice of the LED on the motor control board. Is it flashing steady or is it flashing a code or?
It's flashing. I used the exact part number. The belt will continue to move at whatever speed I force it to use. When I'm on it and force it to go slow it will stay going slow by itself even if I try use the control to change the speed. It also continues moving even when I remove the safety key. It does the same thing if I force the belt to move quickly. Would a sucky solder job do this?
Wow, thank you! This was exactly my treadmills problem and I fixed (once MOSFET arrived from Amazon, as I could not find locally) it quickly! Yay! Thank you so much!
Awesome video! No run around, straight to the point. I have a question, how did you determine to remove that MOSFET instead of the other? Any tips? Maybe I'll just try removing both and testing them as you did.
Hi thanks for posting this valuable information. I fixed as you explained. But , after week , again same problem started, like start and immediately stop . So , now what could be go wrong? Same misfit, or another mosfit, or my soldering might defective? Your advice is highly appreciated! Thanks again!
Great video with the best directions. What happens if you use a higher spec Mosfet such as Replacement and Equivalent of IRFP250N Transistor? The spec sheets say you can replace the IRFP250N with the IRFP250M, IRFP260M, IRFP260N, IRFP4227, IRFP4229, IRFP4232, IRFP4242, IRFP4332, IRFP4668, IRFP4768, IRFP90N20D, these go up to over 500watts heat distribution with a higher amperage rating. I would think you would avoid popping a Mosfet by someone just jumping on the board while it was running or very short spikes from your AC supply. These Mosfets the , 260N are constantly popping on treadmills while people are buying $250.00 replacement boards. Any suggestions on what supplier to use for parts?
Just to be clear, I'm not an expert on treadmill speed controllers. Im just a humble mechanic lol I wouldn't know what supplier to recommend. I know using a higher rated MOSFET should work, as long as it physically will fit in place. Like using a 260n in place of a 250n. If the part that came off the board is an "N" type you wouldn't want to use a "P" type, as it will flow current in the wrong direction. As far as I understand. Using a higher amperage unit may caus over currant draw on up stream components when over loading the motor. The motor controller has fault management to reduce output power is the instance there is an overload but, it may have limitations.
I changed the mosfet, it was working until I stepped on. I changed the mosfet again, loosened and lubricated the belt. I then recalibrate the treadmill, had to lower the top speed to 10.5 ish. Everything seemed perfect, I got on and after 3 step the mosfet and what I think are diode's R29 and R30 all blew, diodes turned black. Any other ideas would be much appreciated, thank you for your video!!
Hi, great video. I am not an electronics guy, but you make this fix look pretty easy. It will certainly save a lot of $$. My Zordic Trac treadmill is doing exactly as your video shows, so I'm pretty certain I have the same problem. The only difference is my MOSFET numbers are slightly different than yours. Will it make a difference? Mine are IRFP25ON, I*R, 3371, 53, D3. I tried attaching a photo of mine to this comment, but TH-cam would not allow me. If you have an email address I can send you the photo. Thanks, Brent
I have searched Amazon and Google and cannot find an exact match for my MOSFET. It has the numbers in my previous comment. Does anyone who is much smarter than me give me suggestion on where I can buy one and if another type will work. I find plenty with IRFP25ON, but they never match the other numbers/letters. Thanks in advance. Brent
Thank you! I have almost the exact same board. After replacing the MOSFET it worked fine and I ran the treadmill for awhile. However as soon as I got on it, the MOSFET shorted again… I did this twice, same result. Belt is lines and tension is good. Any ideas?
Thankyou for the video, my Nordictrack 1750 had exact same issue. I relaced the mosfet but also noticed a burned out resistor next the the earth LG1 so i replaced it as well. When i powered up the treadmill the new resistor burned immediately however the treadmill worked. Well for about 15 minutes anyway now its back to tripping straight away again. Ive tested the motor for shorts and its fine. motor runs smooth off a battery. any suggestions?
Great video - I ordered what I need and will try the fix tomorrow. Question - did your controller board coast any LED error signals? Mine flashes red 4 times, pauses, then repeats. I’m wondering if it’s a similar error to yours
I've followed your steps & replaced the MOSFET. It does now run, but at top speed as soon as you press start. Are there different versions of the IRFP250N MOSFET? The full number string on the original is "IIRFP250N 442L B8 CA" and the replacement is "IRFP250N P033D 5105". Or does this suggest that the issue is with a different component, and perhaps that's why the MOSFET shorted in the first place? Thanks for the easy to follow video.
Hi, had the exact same issue on our treadmill. I replaced the transistor as shown in video twice and treadmill running smoothly but the moment, we start walking on it, Same problem occurred again. I did check the motor with an 18-volt battery & it is running well. Any ideas? Thanks for your help.
Thanks for posting such valuable information. I have same problem, now I have 2 mofsets , one is Hfa 15p b60 and irfp 250n . Now do I need to replace both or just irfp 250 n ? Please help. Greatly appreciated!
Hey! So i replaced this piece as instructed and it solved the issue of it turning on at full speed and immediately shutting off. However, now it turns on and continues running, but it only runs at full speed. When I replaced the Mosfe, I did not have another heat transfer pad to put on the back of it, so its back in there with out that. Could this be the issue, or do you think another part is out? I really appreciate the tutorial and any additional feed back you can give me!
The heat transfer pad delete will not cause the issue; you can use dielectric grease in its place. I would think another part is bad. Or maybe a bad solder joint in the MOSFET.
i changed the mosfet out but didn't have a multimeter to test it prior. Connected the board and it did the same start stop thing. Got a multimeter and tested the rest of the batch (bought a pack of 5) and they range from 29 to 53 on the readings while the original shows as well as the one I replaced it with. Had accidently left the treadmill turned on but not moving and when I came back some time later the raised white bar (runs widthwise to the board) was very hot - is that normal? Also could I have a secondary issue that burned out the new mosfet as soon as I turned on the treadmill?
Good video, but why does it go bad, the MOSFET? My treadmill is under warranty and they have replaced the control board 3 times, everytime the same problem reoccurs after some time...the problem is that the machine starts and stops intermittently, no pattern whatsoever
The MOSFET will burn out due to a few things. First is lack of Q.C. second is over currant draw from motor working too hard. Third is too much load on the running belt. i.e. lack of lubrication or improper adjustment. I'm not a treadmill expert but this is what I know.
@@MrFixit1 Ah thanks. Did you test all of them on the board before you discovered the MOSFET was the issue? I'm not sure what results i should be getting from the rest of them.
@@richardpaton4689 I only tested the one MOSFET as I assumed it was what burnt out. Short all 3 pins of the MOSFET together with your meter lead then test continuity, one leg should give you a reading and other should not. You can do this with it installed. NOTE: shorting all 3 legs turns the MOSFET off. You can also turn it on with the meter and test it that way. Do a google search on "how to test MOSFET transistor.
check if the running belt has rolling resistance and the tension is adjusted right, and the motor turns freely. any added stress on the motor will burn the MOSFET.
Can I use my multimeter on the Mosfat while it is still plugged into my treadmill? I think this is the same problem I’m having but I want to diagnose without having to take it all apart
Thanks again for your video and reply . I was able to find 250n but still same result when I reinstalled board ? The motor runs maybe a second and shuts down, the indicator light goes off when this happens then flashes once and stays solid ? Any ideas ps. Made sure my soldier job was good. Could another component cause this same issue?
@@GT-fh2ci I'm not an expert on treadmill speed controllers but yes it's possible another component is bad, maybe the big diode right next to the MOSFET is bad. If you can test this part I would start there. Also, possible the pulse width signal is not reaching the controller from the console. Check all connections from the console. Also possible the motor is bad causing a high current draw. Read through the troubleshooting manual I included in this video if you haven't already and see if anything relates to your issue.
I had the same problem but after all the work my MOSFET just popped from the soldered area (the right pin). Maybe the wrong type of solder? I did notice that my solder was easy to melt but the one from the board took longer. What kind of solder did you use? BTW this was my first project ever. Thank you for your help !
Hi, I replaced the mosfet, and it still dies after 1 second of run time. However, it seems to start not at full power like before....Any ideas? Any help is appreciated.... Also, I used a battery and tested the motor directly, and it works. Also the large capacitor on the board is puffed up however it does have a rubber top....
So how do you know if it’s the mosfet or reed switch related? Red light on mine and shuts off like yours. Your flow chart says that’s speed related. Says to replace/repositoon, or replace controller, harness, console. How do you determine if it’s the mosfet?
MOSFET was bad, reed switch was good. Successfully swapped out the mosfet and it lasted one day and is back to doing the same thing. What causes the mosfet to go bad?
Hi i have a treadmill board with a blown IRF 260 n Mosfet can you tell me what causes that problem and should i be looking at something else before i replace it. thanks
I'f the running belt is too tight or if the roller bearings are failing or if the belt is not lubricated sufficiently or the motor is going bad. Pretty much if there if too much load on the board then you will burn out a MOSFET. Also check that the wire connection are clean and tight. I'm sure there are other reasons but these are the most common.
Test the MOSFET If is shorted in the closed position this might cause this issue. The speed control board gets a pulse width modulated signal from the console so, the motor should not run without this signal. The MOSFET is just an on\off switch. if it is stuck on then the motor will run continuously. I'm not a treadmill expert so this is my best guess.
Hi, not sure if you are still monitoring this video but I have a question. I changed the MOSFET and it worked for a few minutes and then same issue as before, quick start and stop. Any ideas?
Hi there, so I had the exact same problem, and replacing the mofset fixed it - but the bliss of victory died quickly, as the normal expected behaviour only lasted for a few starts, and then while testing by running on it the treadmill tripped out and stopped. Now it’s doing the exact same thing again… assuming another blown mofsat. any suggestions on what’s causing it to blow? Luckily my Amazon order delivered 10 mofsats.
A few more clues. When it did restart successfully the first few times, it overshot the speed at first and adjusted downwards (speed 5 launched up to 6 first then adjusted down to 5 after several seconds). It hadn’t done this before. Also on the first time the mofsat had failed, I recalled the treadmill ran up quite quickly, shut off, and then exhibited the failed mofsat behaviour in your video. Any help is appreciated!
I think you are referring to the pulse width modulator generator. This Box generates a small voltage pulse to trigger the board to start the engine at a set speed.
I am have a problem with my treadmill it's a Bowflex TreadClimber TC 5000 all the lights turn on it just stopped working I need to talk to somebody I live in Tucson Arizona if somebody can help
If there are other damaged circuits on the board, I can't really help through Text. If you happened to order more than one MOSFET I would try replacing it again. It is possible the first part was bad out of the box, or a questionable solder connection failed and burnt-out the new part.
A few people have had to replace the MOSFET a second time, for some reason the MOSFET went bad on install. If you bought more than one you might try again. I had to do the same on my MC2100.
@MrFixit1 the new mosfet did go bad though im not sure if it was during installation or powering on. I assumed something else was killing it, but if it went bad during installation then I suppose there might still be hope. I bought two so I'll give it another go, thanks for the suggestion 👍
Tried the second mosfet, kept testing it throughout the whole process. It was good right up until I turned the speed on and the motor started spinning. Immediately after, the treadmill powered off, I saw a bit of smoke coming from the mosfet and a bad smell. Tested it and its dead. So it seems like the motor is frying it somehow
@@onusai I don't know if your able to but, check the motor windings for resistance and ground faults. You can take the model numbers off of the motor and type them into google or try to contact the manufacturer to get the specifications. If the motor is shorted that will kill the MOSFET.
Any idea what else it can be? I followed all the steps and it did the same thing. I did accidentally order irfp260 instead of the 250 would that keep it from working properly?
@@thomasquintana4338 The cold could be the issue as to why it quit in the first place. If the motor has extra load i.e. cold belt dragging the motor down that would pop the MOSFET. Would need to check the diode to the right on the MOSFET and see if it also popped. Also the transistor to the far right. Condensation on the board could be an issue as well. A bad pulse signal from the console may also be the issue. The MOSFET is the most common part to fail.
Hi Bud thanks a lot for the video ! Is there a specific MOSFET I need to buy ? It appears that I have the same board as yours ! Did you change only one of them if I need to change both ? Thanks a lot !
I only changed the one but if you feel you need to change all of them. The number is printed on the MOSFET just goggle the number and you will find it.
@@megofishn IRFP250N is the part number and as far as I know the other numbers are for manufacturing proses. IRFP250n Or IRFP260N (higher amp rating) are the numbers you need to get the right part.
Hi sir. My treadmill turn itself off(feel like a trip) as soon as i turn it on, not running it, just turning it on. What could the problem be? This happen after i change the mosfet. Thanks.
Installing a new MOSFET may not fix your problem. Other issues may be the cause of the malfunction, Check that the running belt moves freely, and nothing is binding, and all other connections are good and replace any other parts that may be suspect. I included a trouble shooting flow chart in this video reed through that and see if you have any other issues. Beond that I can't help without testing all other components.
CAN you please help I did change that part and now it's not even doing that short run before turning off
But lights go on and Treadmil thinks it's running
Big Thanks!! You saved me $200 worth of controller. I had the exact same problem and with your instructions it made so easy to replace even for newbie like me. I had MC2000 board and never had any experience with soldering. Following your recommendation only cost $8 USD.
So random that I found this video, but I removed the mosfet and it's definitely busted. I get the new one in tomorrow. You just saved my around $200 for a new board! Thank you so much.
Where do you get
These parts
Thank you so much! Never fixed anything on a circuit board before but I was able to fix my treadmill for $5!!
Really appreciate the detailed tutorial!
Glad this helped. Thanks for the feed back.
Thanks for posting this video. We just bought a Treadmill from down the street for $80 which according to the previous owner was slipping. I noticed the motor belt was loose and figured I could fix it but very soon after adjusting the motor tension the unit died like the one in your video. I think the previous owners tried to solve the slipping by tensioning the running belt instead of the motor belt and once I adjusted the motor belt the whole assembly was far too tight and killed the board.
We are going to do a service on the machine and I will try your fix on the board and I will update you!
Thanks again!
Had the exact same issue on our treadmill. We replaced the transistor as shown in video and treadmill running smoothly again. Thanks!
Glad this helped you!
Like many others, found this video with the exact same problem and it wound being exactly as you showed. First time properly soldering a circuit board, but it fixed the problem and saved us a ton of money. Appreciate the video!
Be sure to check your running belt tension and keep it well lubed.
Thanks!!! That was exactly the problem I had. Excellent instructions, easy to follow and so precise. $5 CAD part from my local electronics store to fix.
Do the numbers matter that are under the IRFP250N? I see so many but mine is 709P 44. AX
@@megofishn it seems that the number under doesn't matter. I bought a transistor with different numbers from the original and it worked.
I did the exact same thing and when hooked up the red light just blinks when I hit the start button
Thanks, I followed your lead and after researching found my 250 N could be replaced by a large series of units the difference being able to handle higher amperage and heat dissipation. As you point out, a non lubed belt can cause the initial failure but so can heat. As a PC tech I can tell you the heatsink setup on Nordictrack is attempting to get to 3rd rate. I replaced a 250 with a 260. If course the Mosfet acts as a fuse to some degree if too much amperage is pulled and using a higher amperage Mosfet could cause other component failure. I use PC CPU heatsink paste with the thermal pad and get great results. I am planning on putting together a fixit kit, probably Mosfet, Diode, and capacitors in order to not only fix but upgrade the board for the long term. I am also planning on trying to add a PWM driven fan. Any suggestions greatly appreciated.
I had the same issue!
I have a board mc16xx
Bought the transistor & soldering kit kit from Amazon spent about $30
Problem fixed!
Thank you!
I have the proform perfomance 800i that had the same symptom. Ran fast and slows to a stop. Turns out, the 1500uf 200v fujicon filter capacitor is dead along with another 2200uf 16v dead capacitor. The mosfet IRF250M also looked burned. I bought the replacements and will see if that solves the problem later when digikey gets them to me. This boards electrolytic capacitors “fujicon” seem cheap.
Thanks for the video. I was able to diagnose and fix the motor controller with your help. Cost of repairs wes $10 for the transistor including shipping.
Glad this helped!
Thanks! this fixed my treadmill! It was not easy to remove the mosfet for me. If i had a 3 tipped soldering iron, i think it would have been easier :)
Every time i had one terminal liquid, I obviously couldn't wiggle it out since the others were still solid, but by the time i melted the other two, the first one had set up. I really needed a solder sucker, or whatever would help me remove the solder from each post separately... But that's my fault. Amazon had a two pack of Mosfets for $10.
just tried it this morning and it is broken again. I don't know if i did it. I was showing my daughter how to use it. I told her it shouldn't start in "6 mph" and assumed that was the case. But, it started fast for a split second and shut off. Now it does it every time i hit "start". So maybe i fried the MOSFET? or something else is wrong that is frying the MOSFET. I would have thought that the electronics would only allow a ramp up to 6 if you try to start at 6.
Thanks man! Your tip helped fixing my ProForm treadmill and saved me $200! My board is a little different from yours and it has an IRFP250M transistor rather than IRFP250N. But I was able to find a new IRFP250M and replaced it. Now my treadmill works like new.
I couldn’t find IRFP250M so used IRFP250N and it did not work for me. What is difference between M and N ?
Thanks for the vid. Was able to get my treadmill up and running today thanks to you!
Thank you so much! I just found this video tonight and tomorrow is an early Monday morning. I will thank you again after I complete the job. Appreciate your help!
Good Luck Hope this helps
Sir, it took me much longer to complete the job. Now when I turn it on it barely creeps and won't stop unless I turn the machine off. Any advice?
@@htconesv897 That's interesting. Did you replace with same model part? "N" not "P" type MOSFET correct? Could be a signal error from the control console. Check the statice of the LED on the motor control board. Is it flashing steady or is it flashing a code or?
It's flashing. I used the exact part number. The belt will continue to move at whatever speed I force it to use. When I'm on it and force it to go slow it will stay going slow by itself even if I try use the control to change the speed. It also continues moving even when I remove the safety key. It does the same thing if I force the belt to move quickly. Would a sucky solder job do this?
@@htconesv897 Possibly a bad solder job.
Wow, thank you! This was exactly my treadmills problem and I fixed (once MOSFET arrived from Amazon, as I could not find locally) it quickly! Yay! Thank you so much!
Does the MOSFET have a number on it? How or where did you find it on Amazon?
Awesome video! No run around, straight to the point. I have a question, how did you determine to remove that MOSFET instead of the other? Any tips? Maybe I'll just try removing both and testing them as you did.
I did some research on the internet and got the meter out and started testing.
Hi thanks for posting this valuable information. I fixed as you explained. But , after week , again same problem started, like start and immediately stop .
So , now what could be go wrong? Same misfit, or another mosfit, or my soldering might defective?
Your advice is highly appreciated! Thanks again!
Great video with the best directions. What happens if you use a higher spec Mosfet such as Replacement and Equivalent of IRFP250N Transistor? The spec sheets say you can replace the IRFP250N with the IRFP250M, IRFP260M, IRFP260N, IRFP4227, IRFP4229, IRFP4232, IRFP4242, IRFP4332, IRFP4668, IRFP4768, IRFP90N20D, these go up to over 500watts heat distribution with a higher amperage rating. I would think you would avoid popping a Mosfet by someone just jumping on the board while it was running or very short spikes from your AC supply. These Mosfets the , 260N are constantly popping on treadmills while people are buying $250.00 replacement boards. Any suggestions on what supplier to use for parts?
Just to be clear, I'm not an expert on treadmill speed controllers. Im just a humble mechanic lol I wouldn't know what supplier to recommend. I know using a higher rated MOSFET should work, as long as it physically will fit in place. Like using a 260n in place of a 250n. If the part that came off the board is an "N" type you wouldn't want to use a "P" type, as it will flow current in the wrong direction. As far as I understand. Using a higher amperage unit may caus over currant draw on up stream components when over loading the motor. The motor controller has fault management to reduce output power is the instance there is an overload but, it may have limitations.
I will be replacing a 250N with a 260N next week. @@MrFixit1
I replaced a 250N with a 260N and it worked just fine. Next time I bump it up a couple of notches.
@@MrFixit1
Good video. I replaced the MOSFET you showed but still have the same problem. Should I replace both MOSFETs?
I replaced the mosfet as you suggested and it work fine until I started walking at a faster pace. Now I’m back to square one.
Maybe the running belt is not moving freely or the motor is dragging
Thank you, I’ll replace the mosfet and check the motor belt tomorrow
I changed the mosfet, it was working until I stepped on. I changed the mosfet again, loosened and lubricated the belt. I then recalibrate the treadmill, had to lower the top speed to 10.5 ish. Everything seemed perfect, I got on and after 3 step the mosfet and what I think are diode's R29 and R30 all blew, diodes turned black. Any other ideas would be much appreciated, thank you for your video!!
Motor may be bad. Check the motor windings for a short to ground and proper resistance.
Hi, great video. I am not an electronics guy, but you make this fix look pretty easy. It will certainly save a lot of $$. My Zordic Trac treadmill is doing exactly as your video shows, so I'm pretty certain I have the same problem. The only difference is my MOSFET numbers are slightly different than yours. Will it make a difference? Mine are IRFP25ON, I*R, 3371, 53, D3. I tried attaching a photo of mine to this comment, but TH-cam would not allow me. If you have an email address I can send you the photo. Thanks, Brent
I have searched Amazon and Google and cannot find an exact match for my MOSFET. It has the numbers in my previous comment. Does anyone who is much smarter than me give me suggestion on where I can buy one and if another type will work. I find plenty with IRFP25ON, but they never match the other numbers/letters. Thanks in advance. Brent
Thank you! I have almost the exact same board. After replacing the MOSFET it worked fine and I ran the treadmill for awhile. However as soon as I got on it, the
MOSFET shorted again… I did this twice, same result. Belt is lines and tension is good. Any ideas?
Same problem, ran untill I put pressure on it and shorted again
Best repair vid on this subject, thanks!
I figured it out it was a bad MOSFET thank you for your video
Thankyou for the video, my Nordictrack 1750 had exact same issue. I relaced the mosfet but also noticed a burned out resistor next the the earth LG1 so i replaced it as well. When i powered up the treadmill the new resistor burned immediately however the treadmill worked. Well for about 15 minutes anyway now its back to tripping straight away again. Ive tested the motor for shorts and its fine. motor runs smooth off a battery. any suggestions?
Great video - I ordered what I need and will try the fix tomorrow. Question - did your controller board coast any LED error signals? Mine flashes red 4 times, pauses, then repeats. I’m wondering if it’s a similar error to yours
The LED on my board stayed lit solid.
I've followed your steps & replaced the MOSFET. It does now run, but at top speed as soon as you press start. Are there different versions of the IRFP250N MOSFET? The full number string on the original is "IIRFP250N 442L B8 CA" and the replacement is "IRFP250N P033D 5105". Or does this suggest that the issue is with a different component, and perhaps that's why the MOSFET shorted in the first place? Thanks for the easy to follow video.
You have an unrelated issue sounds like.
same thing happened to me, did you find a fix😊
I replaced the mosfet and the achine continues to do the same. Can you detail if there are any other components that would create the same condition?
Treadmill speed sensor, misaligned, missing, damaged....... search per your model.... hope this helps
Do you have to desolder the mosfet?
Hi, had the exact same issue on our treadmill. I replaced the transistor as shown in video twice and treadmill running smoothly but the moment, we start walking on it, Same problem occurred again.
I did check the motor with an 18-volt battery & it is running well. Any ideas? Thanks for your help.
Thanks for posting such valuable information. I have same problem, now I have 2 mofsets , one is Hfa 15p b60 and irfp 250n . Now do I need to replace both or just irfp 250 n ? Please help. Greatly appreciated!
I would replace the one IRFP250n and see if that fixes the problem.
Yes! I got it ! Thanks 🙏🏻
Hey! So i replaced this piece as instructed and it solved the issue of it turning on at full speed and immediately shutting off. However, now it turns on and continues running, but it only runs at full speed. When I replaced the Mosfe, I did not have another heat transfer pad to put on the back of it, so its back in there with out that. Could this be the issue, or do you think another part is out?
I really appreciate the tutorial and any additional feed back you can give me!
The heat transfer pad delete will not cause the issue; you can use dielectric grease in its place. I would think another part is bad. Or maybe a bad solder joint in the MOSFET.
AFAIK The pad is also an insulator, the FET cannot contact the heat sink.
I replaced the MOSFET transistor and it fixed this problem but then blew again shortly. Any idea why?
Please provide the reference to purchase the PWM gadget. Thanks.
www.amazon.com/Coliao-Generator-1-Channel-1Hz-150kHz-Frequency/dp/B0CGZK1PB2/ref=sr_1_5?crid=1VGG2C5PUF292&keywords=MiOYOOW+PWM+Frequency+Generator%2C+1-Channel+1Hz-150KHz+Adjustable+Pulse+Duty+Cycle+Function+Generator%2C+Square+Wave+Signal+Generat&qid=1704415474&sprefix=mioyoow+pwm+frequency+generator%2C+1-channel+1hz-150khz+adjustable+pulse+duty+cycle+function+generator%2C+square+wave+signal+generat%2Caps%2C153&sr=8-5
I have a IRFP260M that is bad but I don't know which replacement to purchase. I can't find one with the same exact code on the mosfet? Does it matter?
Have you found it? Because I was not able to find IRFP260M
i changed the mosfet out but didn't have a multimeter to test it prior. Connected the board and it did the same start stop thing. Got a multimeter and tested the rest of the batch (bought a pack of 5) and they range from 29 to 53 on the readings while the original shows as well as the one I replaced it with. Had accidently left the treadmill turned on but not moving and when I came back some time later the raised white bar (runs widthwise to the board) was very hot - is that normal? Also could I have a secondary issue that burned out the new mosfet as soon as I turned on the treadmill?
Good video, but why does it go bad, the MOSFET? My treadmill is under warranty and they have replaced the control board 3 times, everytime the same problem reoccurs after some time...the problem is that the machine starts and stops intermittently, no pattern whatsoever
The MOSFET will burn out due to a few things. First is lack of Q.C. second is over currant draw from motor working too hard. Third is too much load on the running belt. i.e. lack of lubrication or improper adjustment. I'm not a treadmill expert but this is what I know.
@@MrFixit1 Thanks. Good explanation, I will check the lubrication.
I replace the part that you mentioned and it still does it what should I look for next?
Thank you for sharing your awesome man!!!!!...
Hiya, great vid! What power is your soldering iron? Did you get the same result when the part was still soldered to the board? Thank you
Not sure about the wattage maybe 15w $3 Harbor Freight Iron. You should get same test result with MOSFET in place on the board.
@@MrFixit1 Ah thanks. Did you test all of them on the board before you discovered the MOSFET was the issue? I'm not sure what results i should be getting from the rest of them.
@@richardpaton4689 I only tested the one MOSFET as I assumed it was what burnt out. Short all 3 pins of the MOSFET together with your meter lead then test continuity, one leg should give you a reading and other should not. You can do this with it installed. NOTE: shorting all 3 legs turns the MOSFET off. You can also turn it on with the meter and test it that way. Do a google search on "how to test MOSFET transistor.
Replaced it it worked for about 5 minutes and then broke again I'm going to try again and replace both of those and see what happens
check if the running belt has rolling resistance and the tension is adjusted right, and the motor turns freely. any added stress on the motor will burn the MOSFET.
Can I use my multimeter on the Mosfat while it is still plugged into my treadmill? I think this is the same problem I’m having but I want to diagnose without having to take it all apart
yes
Terimkasih Infonya Pak.
Any idea if this is the module used in the NordicTrack Commercial 1750? I'm having the same issues as mentioned.
Where can I order the park?
Great video ,had this happen this morning. Having trouble finding the 250n would irfp 260n work?
Yes
Thanks again for your video and reply . I was able to find 250n but still same result when I reinstalled board ? The motor runs maybe a second and shuts down, the indicator light goes off when this happens then flashes once and stays solid ? Any ideas ps. Made sure my soldier job was good. Could another component cause this same issue?
@@GT-fh2ci I'm not an expert on treadmill speed controllers but yes it's possible another component is bad, maybe the big diode right next to the MOSFET is bad. If you can test this part I would start there. Also, possible the pulse width signal is not reaching the controller from the console. Check all connections from the console. Also possible the motor is bad causing a high current draw. Read through the troubleshooting manual I included in this video if you haven't already and see if anything relates to your issue.
Yes, I did that two weeks ago.
I had the same problem but after all the work my MOSFET just popped from the soldered area (the right pin). Maybe the wrong type of solder? I did notice that my solder was easy to melt but the one from the board took longer. What kind of solder did you use? BTW this was my first project ever. Thank you for your help !
Try again. May not have had it soldered well enough.
But does the type of solder matter?
@@gabrielquintero3338 As long as you are using Flux core for electronics and not acid core for plumbing. I use led free Flux core.
Thank you. I used what came with the kit. A thin one that came in a narrow tube
Hi, I replaced the mosfet, and it still dies after 1 second of run time. However, it seems to start not at full power like before....Any ideas? Any help is appreciated....
Also, I used a battery and tested the motor directly, and it works. Also the large capacitor on the board is puffed up however it does have a rubber top....
I would replace the Capacitor and try a new MOSFET. Also check the connections coming from the console.
@MrFixit1 Thank you. I ordered a new capacitor, and I have a few extra mosfets. Should be here tomorrow so cross your fingers...
Thank you for that video it was very.
Where do you order a resistor like?
Just google it.
You are a wizard dude!
LOL thanks, I just do what I do and things happen.
So how do you know if it’s the mosfet or reed switch related?
Red light on mine and shuts off like yours. Your flow chart says that’s speed related. Says to replace/repositoon, or replace controller, harness, console.
How do you determine if it’s the mosfet?
test MOSFET
MOSFET was bad, reed switch was good. Successfully swapped out the mosfet and it lasted one day and is back to doing the same thing. What causes the mosfet to go bad?
Hi i have a treadmill board with a blown IRF 260 n Mosfet can you tell me what causes that problem and should i be looking at something else before i replace it. thanks
I'f the running belt is too tight or if the roller bearings are failing or if the belt is not lubricated sufficiently or the motor is going bad. Pretty much if there if too much load on the board then you will burn out a MOSFET. Also check that the wire connection are clean and tight. I'm sure there are other reasons but these are the most common.
@@MrFixit1 thanks for your help
Do you know what would cause the motor to short out after running on the treadmill for 10 minutes and increasing the speed? I have a ND C1750. thx
Good chance there is a lot of friction in the running belt.
What is the part called ?
How do you order the right MOSFET? What I mean is I can find them but only the top numbers come up at the bottom numbers
The top numbers are all you need. The numbers I read off in the video. IRFP250N I think it was.
@@MrFixit1 okay thank you
I’m having a problem desoldering…what’s the trick
Add lots of solder to bridge the gap between all three pins
Ordered some on Amazon
Hi. can you tell me how you can find the PWM pin on the circuit board?Thank you.
The blue wire is the PWM + Black with white stripe is the PWM - red is power + and black is power - on the 8 pin connector.
Very impressive!
My treadmill motor just starts up as soon as I turn it on and I can't adjust anything, the screen buttons won't slow it down ...any advice?
Test the MOSFET If is shorted in the closed position this might cause this issue. The speed control board gets a pulse width modulated signal from the console so, the motor should not run without this signal. The MOSFET is just an on\off switch. if it is stuck on then the motor will run continuously. I'm not a treadmill expert so this is my best guess.
@@MrFixit1 thank you, I'll try it out
Hi, not sure if you are still monitoring this video but I have a question. I changed the MOSFET and it worked for a few minutes and then same issue as before, quick start and stop. Any ideas?
Could be the motor going bad or you have a lot of tension or drag on the running belt causing and overload current draw.
Where do you get your capacitors from?
use to be Radio Shack, but now all the usual places like eBay, Amazon. But a lot of times I'll salvage from old broke down electronics.
Hi there, so I had the exact same problem, and replacing the mofset fixed it - but the bliss of victory died quickly, as the normal expected behaviour only lasted for a few starts, and then while testing by running on it the treadmill tripped out and stopped. Now it’s doing the exact same thing again… assuming another blown mofsat. any suggestions on what’s causing it to blow? Luckily my Amazon order delivered 10 mofsats.
A few more clues. When it did restart successfully the first few times, it overshot the speed at first and adjusted downwards (speed 5 launched up to 6 first then adjusted down to 5 after several seconds). It hadn’t done this before. Also on the first time the mofsat had failed, I recalled the treadmill ran up quite quickly, shut off, and then exhibited the failed mofsat behaviour in your video. Any help is appreciated!
@@alanlaidlaw386 If there is excessive drag on the running belt or the motor is failing will cause the MOSFET to burn out. I would start there.
How about when your kid gets a ball stuck in the belt
Our board uses a IRBP250M but kinda hard to locate. It seems like the IRBP250N is the same thing, am I wrong?
As long as it is an "N" type and has the same amperage rating and the physical body size is the same, I don't see any problem using it.
Can you go over the item you connected to the MC2100 please?
I think you are referring to the pulse width modulator generator. This Box generates a small voltage pulse to trigger the board to start the engine at a set speed.
I am have a problem with my treadmill it's a Bowflex TreadClimber TC 5000 all the lights turn on it just stopped working I need to talk to somebody I live in Tucson Arizona if somebody can help
Can a 260N MOSFET work as well instead of the 250N mosfet
Yes.
I had a 245 and replaced it with a 250N. Same problem; starts then stops. Any suggestions? Board is 2100 Rev 5.
If there are other damaged circuits on the board, I can't really help through Text. If you happened to order more than one MOSFET I would try replacing it again. It is possible the first part was bad out of the box, or a questionable solder connection failed and burnt-out the new part.
Thank-you. I'll try another MOSFET.
Right you are! Replaced the MOSFET (I orderd 5). Now running! Thank-you so much.
From where you get part
I looking everywhere for the part frt250n 3A 29
Any one knows where i can get it please 🙏🏻 thank you
Amazon, Ebay
We're can I buy the transistor can you post a link or comment 2 me
I got mine from Amazon. Came in a pack of 5
@@MrFixit1 yes I found it thank you $40 to get all I need to fix the compared to the $90-$200 alternative so thank u
@@darkwulf6969 Good luck
Mine will start, stop then start again and it will run for 20 minutes then shut off. Is this the same issue?
Not the same issue. Sounds like the motor is over heating.
@@MrFixit1 oh ok. So it sounds like the motor then?
@@maj3stikq122 May be the running belt needs lubed or re adjusted causing more friction than usual, but I'm just speculating.
@@MrFixit1 ok well thank you! I lubed the running belt but I think it needs more I did not put much. I will try and adjust it as well.
Thank you
Thanks
You're welcome
great video, didnt fix mine unfortunately
A few people have had to replace the MOSFET a second time, for some reason the MOSFET went bad on install. If you bought more than one you might try again. I had to do the same on my MC2100.
@MrFixit1 the new mosfet did go bad though im not sure if it was during installation or powering on. I assumed something else was killing it, but if it went bad during installation then I suppose there might still be hope. I bought two so I'll give it another go, thanks for the suggestion 👍
Tried the second mosfet, kept testing it throughout the whole process. It was good right up until I turned the speed on and the motor started spinning. Immediately after, the treadmill powered off, I saw a bit of smoke coming from the mosfet and a bad smell. Tested it and its dead. So it seems like the motor is frying it somehow
@@onusai I don't know if your able to but, check the motor windings for resistance and ground faults. You can take the model numbers off of the motor and type them into google or try to contact the manufacturer to get the specifications. If the motor is shorted that will kill the MOSFET.
I have the same problem
Any idea what else it can be? I followed all the steps and it did the same thing. I did accidentally order irfp260 instead of the 250 would that keep it from working properly?
Does your treadmill have the MC-2100 motor controller? Is the LED lit up on the board or is it blinking or off?
Could the cold be an issue? I have the treadmill in my garage and it was probably around 40F
@@thomasquintana4338 The cold could be the issue as to why it quit in the first place. If the motor has extra load i.e. cold belt dragging the motor down that would pop the MOSFET. Would need to check the diode to the right on the MOSFET and see if it also popped. Also the transistor to the far right. Condensation on the board could be an issue as well. A bad pulse signal from the console may also be the issue. The MOSFET is the most common part to fail.
@@Flirtnigga94 Thats some name you got there Sir! lol
MosFAT? It’s mosFET
Hi Bud thanks a lot for the video ! Is there a specific MOSFET I need to buy ? It appears that I have the same board as yours ! Did you change only one of them if I need to change both ? Thanks a lot !
I only changed the one but if you feel you need to change all of them. The number is printed on the MOSFET just goggle the number and you will find it.
I find the IRFP250N MOSFET but what are different numbers under it? Mine is 709P 44. AX?
@@megofishn IRFP250N is the part number and as far as I know the other numbers are for manufacturing proses. IRFP250n Or IRFP260N (higher amp rating) are the numbers you need to get the right part.
Hi sir. My treadmill turn itself off(feel like a trip) as soon as i turn it on, not running it, just turning it on. What could the problem be? This happen after i change the mosfet. Thanks.
check if the circuit braker tripped. May have a crossed solder joint causing a short circuit. This would be my guess.
Where can I order the park?
Where can I order the park?
Ebay