1. The treadmill won't start. This may be caused by a broken power cord or a faulty socket. You can check whether the plug of the power cord is firmly connected and whether the socket is working properly.
2. The flight belt slides. This may be caused by excessive grease on the belt, belt looseness or wear. You can clean the belt or adjust the tension of the belt to avoid using lubricant.
3. The speed of the treadmill is unstable. This may be caused by unstable power line voltage, treadmill controller failure or sensor failure. You can check whether the voltage is stable and replace the controller or sensor if necessary.
4. The treadmill is too noisy. This may be caused by belt wear, motor failure, damaged or loose bracket, etc. You can check and replace the corresponding parts to ensure that they work properly.
5. The screen display is not normal. This may be caused by power cord failure, loose screen cable or controller failure. You can check the power cord, screen cable and controller, and try to reconnect or replace them.
In short, when using the treadmill, you need to check and maintain it frequently to avoid failure. If there is any problem, investigate and solve it in time to ensure the normal operation of the machine and prolong its service life.