LifeFitness 3500 Treadmill Speed Error
- The user is pushing the belt faster than the speed is set (more common when the unit is elevated).
- The heatsink control board is bad.
- Check for the presence of error when the unit is at 0% elevation. If the error is not present at 0% elevation, instruct the user on the proper use of the treadmill.
- Test unit with a known good heatsink control board. Replace the heatsink control board if necessary.