Our Nordic Track C2255 has worked great... until today. I went to start it and after placing the saftey magnet to turn it on, the incline rises and keeps trying to rise even after it has reached the max % incline. Nothing else works. The screen just sais incline.

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Hi
I have Nordictrack c2255 having software issue. Display is showing upside down and I think it needs to be reprogram

Maybe there is a problem with either roller.
Do you think ?

this happen to due the lack of maintenance according the schedule manintenance. see the video and proceed.However if after you did, the problem remain,is TIME to replace the old board deck. God bless you

You must tried again the s.calibration, for easy diagnose, and troubleshooting.
However you must Adjust the speed sensor, test it, clean it, and tight any plug or connector, see the diagrams attached and proceed according.
2) Lube the elevation motor, the shaft + gear, test the motor itself for open or short. see the diagram attached. If you machine use RELAIS test it for dirty, or open and repair.
God bless you

The black shavings are normal on a treadmill. It may be that you need to tighten the walking belt. Try tightening the two bolts on the rear of the machine that hold the rear roller in place. You need to tighten each of them the exact same amount or you'll throw off the alignment. Tighten them three turns of the wrist and see if that helps. If not, try three more turns. If still nothing then replace the drive belt. That can be a real undertaking and you might want to consider contacting a professional.

If the console takesbatteries, replace them. If this does not work or your console does not requirebatteries, check the reed switch or optic sensor. Reed Switch:Unplug the treadmill and remove the motor hood cover. The reed switch is mountedon the frame next to the front roller pulley. There is a magnet glued into thefront roller pulley. When adjusting the reed switch, make sure it is pointingdirectly at the magnet. Move the tip of the reed switch within 1/8" of themagnet. Also, check to see that the wire is not damaged, and is connected tothe console.
See the diagram adjust for 1/8"

After that: Do the next: 1) Tight the flexible cable from keypanel vs Display board.2) Tight the connector from Display Board vs Lower Board( Main Controller Board). See the block diagram that I did how the main controller board has aprox 90% of function from the any treadmill

If the console takes batteries, replace them. If this does not work or your console does not require batteries, check the reed switch or optic sensor. Reed Switch: Unplug the treadmill and remove the motor hood cover. The reed switch is mounted on the frame next to the front roller pulley. There is a magnet glued into the front roller pulley. When adjusting the reed switch, make sure it is pointing directly at the magnet. Move the tip of the reed switch within 1/8" of the magnet. Also, check to see that the wire is not damaged, and is connected to the console.
Optic Sensor: Unplug the treadmill and remove the motor hood cover. The optic disk and sensor are located either at the end of the motor or the right hand side of the front roller. The optic disk spins between two sensors on the optic switch. The disk must spin freely without touching either sensor. The sensors can be moved by loosening the adjustment bolt holding the switch to its bracket. The switch can then be slid. Center the disk.

I can't solve this, but my Nordic Track T5 zi occasionally does the same thing. The previous two times, I waited until the unit "bottomed out", and then pulled the mag switch (key) off. I unplugged the unit, then plugged it back in, attached the key, and all was well. This worked twice before, but today (3/8/2011)the unit's incline is cycling again, and the old fix isn't working. Maybe it will need to go back to Sears! Unit was purchased in October of 2010. Frustrating.

Hello there, The machine is attempting to do an incline calibration. Keep the unit lowered as you have it, reinstall the safety key, allow the unit to go all the way to the top and then all the way to the bottom. The machine will stop when at the bottom and the screen will go back to normal. The machine will not overtravel the incline motor and damage it. Just let the calibration finish the procedure and you will be fine.
Good Luck! Tim
FYI this will happen anytime the safety key is removed while the incline is moving on nordictrack brand machines.