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My precor 9.35 just stopped while i was walking on it. fan on motor runs but i don't think the motor is running. I have a replacement motor but not sure if that is it. where can I get a service manuel?

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Do you have the steel rear roller upgrade yet? 9.35 treadmill have a disease called black dust. If you have not had the roller upgraded, belt changed, and lower PCA changed, then thats your problem. Call Precor Customer support. Does the unit come on? If it works as normal and the motor just does not work, replace DATA cable from Upper Pca to Lower PCA. Then replace the Upper PCA if the cable swap does not work. I am a Precor Tech.

Posted on Apr 09, 2011

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Precor 933i where are fuses


Remove the the black and red wire from the Motor control board, get a drill battery and touch the wires to the positive and negative. If the belt moves, then I would say to replace the MCB.

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Treadmill keeps stoping


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
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Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

My treadmill stops wen runing on it and brings up er 27 on screen


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.

Precor Error Code 27

Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

My treadmill stops wen runing and brings up er 27 on screen


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.

Precor Error Code 27

Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

I have a precor c956i and got error 27 on it, what can i do to resolve probmem? thank you


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.
Precor Error Code 27

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1 Answer

What is error 28


Precor Error 28, Temperature Too High Probable Cause 1. The lower PCA cooling fan is clogged.
2. The lower PCA cooling fan is inoperative.
3. The running belt and/or deck are badly worn.
4. The lower PCA is bad.
5. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Inspect the fan mounted on the lower PCA for dust/debris buildup. Clean if necessary, ensuring the fan spins freely. Some lower PCA's do not have a cooling fan and others may have the fan mounted on the underside of the lower PCA making it not as visible.
  2. The fan was free of dust or debris but does not spin. Make sure that the fan wiring is secure and properly connected to the lower PCA. If no obstruction to the fan and the wiring is good but fan still doesn't turn, replace the lower PCA.
  3. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions; compare the values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  4. Test unit with a known good lower PCA. Replace lower PCA if necessary.
  5. Test unit with a known good drive motor. Replace drive motor if necessary.
Precor Error Code 28

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1 Answer

Hello, Our Precor 9.21si begins slipping after walking or running a few minutes. Seems to be worse the faster you go. After about 1 mile, the house fuse blows. What troubleshooting steps do you thi


This really sounds like the results of long term use without lubrication or wax between the belt and deck. Chances are you will need to replace the running belt and the deck or flip the deck if it has not already been done. The friction builds up between the deck and belt and caused the electronic components to overheat. The machine is shutting down as a precautionary measure. It will do this only so many times before the electronics are zapped. Start with the deck and belt. Hopefully the electronics are okay. With your model and serial number, you can visit our website and view the products we have available for your particular machine.
Precor Repair Parts for 9 21s 9 21si Treadmills Consumer SPORTSMITH net

Feb 03, 2013 | Precor Treadmill 9.21 9.21s 9.25 9.21si...

1 Answer

My nordic track treadmill's walking belt stops when I start walking on it but the motor is still running although the front roller is not moving when I start walking on the walking belt. Do you think the...


Unplug the unit remove the motor shroud inspect the drive belt if the rubber feel slick then my recommendation is to replace the drive belt. Adjusting the drive belt may take care of the problem if you do not need to adjust it too tight. If you choose to do the adjusting and feel you have adjusted the running belt thinking it would resolve the slipping, then back the tension down until it the running belt is slipping then adjust until the slippage is resolved.

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3 Answers

Precor M9.21 Treadmill - Stops under load


This probably did not happened suddenly right? the problem is not the motor however you can easily check the blue capacitor for peace of mind. with the power disconnected, disconnect one side off the capacitor from the top. with a ohm meter put the 2 probes on the cap,you will ear a temporary beep sound from your meter, then reverse your probes on the capacitor and again a temporary sound that mean your capacitor is good and your motor will run OK.

Your problem is more then likely your run belt and bed assembly. When new, these are coated with a wax of some kind for slipping, has you use the machine wax wears off, and so is the belt. You can see a black rubber dust at the rear of the machine. And so resistance increase when pressure is applied on the running belt.

Just behind the on/off switch where the power cord goes in, there is a auto reset 15 amp breaker that trips when too must resistance against the motor increase the amperage over 15amps. At 7 min/m on your speed setting and if the belt is adjusted correctly with nobody on, the motor pull about 6amps, with someone like me 180lbs, the motor pulls an avg of 10amps with a new belt.

If you have a clamp amp meter you can test it yourself.

2 parts you will need to fix this; 50985-101 (bed assembly) and 36355-101 (run belt 17 X 110) This is real easy to install.

make sure these parts are for your machine model # as they did increased the width of their belt over the years

Since 1998 I had to replace these parts 2 times with an average of 3 people using the treadmill every day. This is a good machine and if everything else is good it's worth it. I paid $300 for these parts, i'm sure if you shoppe a little you can do better.

Have a good one

Ben

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