Precor 935 Premium Series Treadmill "runs erratically" Questions

...is ok but it doesn't control right.The speed sensor also looks ok. When 1mph is selected it runs at 2.7mph and doesn't change as speed is steped up then suddenly will jump up to faster speed. ...

my proform 520 runs at high speeds & speeds up on its own Hi, my proform 520 runs at high speeds & increases on its own even if you manually set it the required speed. At times it increases ...

Nordic Track c2200 no speed signal. My NT c2200 treadmill behaved erratically briefly (sudden speed changes up and down) before quitting altogether. The console now behaves as though it's working but ...

C956i Precor is displaying Error code 44 ? Treatmill stopped running. Precor Error 44, Un-commanded Lift Motion Probable Cause 1. Intermittent or bad connection in the lift position ...

console getting erratic numbers and motor will not run. i have checked the reed. my father does not remember how tech support had told him to reset console. Was working intermittenly before we checked

my treadmill is a proform 345s crosswalk. It doesn't keep a constant rate. This just began this morning. It speeds up then slows down and it's impossible to exercise with the variance. What's going on

Even while on manual setting the speed automatically goes up and down, how can i fix this? For instance, I set the speed to 2 and it jumps up to 4.2 for a few seconds, goes down to 1.9, back up to ...

error 22-23-26 we have a problem with the start, Precor Error Code 23 Error Code: 23 Manufacturer: Precor Model: All Models Error Description: Error 23, Motor Pulses Missing after Start Up - ...