The treadmill will sometimes start and most times will not, even though there is still power. Then I will be on and the belt will stop turning. I can move the incline level but that is all.

If the belt on your Nordic Track T12 si treadmill is not running even though the display and other functions appear to be working, there are a few troubleshooting steps you can try:

1. Check the safety key: Ensure that the safety key is properly inserted into the console. The treadmill will not operate if the safety key is not securely in place.
2. Reset the treadmill: Turn off the treadmill and unplug it from the power source. Wait for a few minutes, then plug it back in and turn it on. This can help reset the treadmill's internal systems and may resolve any temporary issues.
3. Calibrate the incline: If you recently used the incline function, it's possible that the calibration of the incline mechanism is off. Consult the user manual for instructions on how to calibrate the incline. This process may vary depending on the specific model of your treadmill.
4. Check the motor and drive belt: Inspect the motor and drive belt for any signs of damage or wear. If the drive belt is loose or worn out, it may prevent the belt from moving properly. If necessary, consult the user manual or contact Nordic Track customer support for guidance on inspecting and adjusting the motor and drive belt.
5. Lubricate the belt: Insufficient lubrication can cause the belt to stick or not move smoothly. Refer to the user manual for instructions on how to properly lubricate the treadmill belt. Use a silicone-based lubricant recommended by the manufacturer.
6. Contact customer support: If none of the above steps resolve the issue, it is advisable to reach out to Nordic Track's customer support. Provide them with detailed information about the problem and any troubleshooting steps you have already taken. They will be able to offer further assistance, including potential repair options or guidance from a technician.

WARNING: DURING THE ENTIRE CALIBRATION PROCESS, STAND ON THE PLASTIC SIDE RAILS ONLY!
DO NOT STAND ON TREADMILL WALKING BELT!
CALIBRATION
1. Turn off treadmill.
2. Simultaneously press PROGRAM, ENTER, and START/STOP for about 3 seconds.
3. Maximum speed will be shown in the TIME/PACE display followed by an "E" for English units or an "N" for metric
units. Press START/STOP to change from English units to metric units.
4. Press ENTER.
5. Press START/STOP. Incline and speed will calibrate simultaneously.
6. When successfully completed, TIME/PACE display will show CAL PASS.
7. Press POWER. Your treadmill is ready for use

alot of times you have to remove the wax spray nozel and clean as the wax hardens over it

This sounds like a possible motor problem.
Icon Fitness is the manufacturer.

follow this steps and fix it. God bless you
Power Supply An inadequate power supply limits a Sole treadmill's speed to 7 mph, even though the display may say it is going faster. Plug the treadmill directly into an outlet without using an extension cord for best performance. If this is not possible, Sole recommends using a short 16 gauge minimum cord.
Belt Too Tight A walking belt that is too loose will slip and one that is too tight runs slowly. Adjust the tension by inserting a 6 mm Allen wrench into the hole in the right end cap at the back of the deck. This gives you access to the tension bolt. Turn the wrench counterclockwise no more than a 1/4 turn at a time to decrease tension or the opposite way to increase tension. Do not tighten more than necessary to eliminate slippage of the belt on the front roller. You must also then adjust for tracking due to increased belt tension by turning both tracking bolts on each side of the end of the rail 1/4 at a time.
Belt Lubrication Sole treadmill belts come pre-lubricated, but after the first 50 hours of use you will need to lubricate the machine again. Use only lubricant sold by Sole. The treadmill can go for another 1,000 hours of use before another lubrication if it is cleaned regularly. If the belt is running slow and you have done everything else, it may be that your belt is ready ahead of schedule. Spread an entire tube width-wise across the center of the deck. The place where your feet hit when walking or running is the ideal location for the lubricant.

see the video and fix it. +LUBE the rollers bearing front and back,+test the drive belt motor too.and replace if necessary.
God bless you

1) LUbe the deck belt, the lack of lube produce Shut down, by enough friction between deck vs deck belt
2) Lube the rollers bearing very well
3) Measure the input voltage motor, if there are the motor need repair
4) Measure the output voltage board, for input voltage motor, if there are Not the board is faulty.
5) Run the software calibration, for diagnose, and troubleshooting.
God bless you

That's an embarrasing admission. A treadmill works like a conveyor belt or a car's fan belt. If it is too loose it will slip under load. There will be an ajuster on your treadmill. All you have to do is tighten the belt. Do not overtighten it though. an

The manual said that after lubricating the deck, press Stop and Speed buttons together for 5 minutes and this will reset the lubrication message and the treadmill should work.

My Proform 550 doess not work the treadmill is not getting any power. Wht might the problem be.