Why is the heart rate displaying erratically on my True TC400?
- SsheilawilliamsAug 26, 2025
If the heart rate on your True Treadmill is displaying erratically or not at all, ensure the transmitter belt contacts are making good contact with your skin and are moist. Make sure you are within 3 feet (1 meter) of the heart rate receiver on the console. If the battery inside the transmitter belt is depleted, replace it with a compatible one. Also, ensure that other users wearing compatible transmitter straps are not within 3 feet (1 meter) of the unit. Environmental interference from high voltage power lines can also cause this issue; try moving the unit or the source of interference.













