What does a 'Display TF 100 Error 1' typically indicate on a treadmill?

A 'Display TF 100 Error 1' on a treadmill usually points to a communication failure between the console (display) and the motor controller. This often means the console isn't receiving speed or incline signals from the motor controller, or vice versa. It doesn't necessarily mean the motor itself is bad, but rather the connection or the controller's ability to communicate.