If your treadmill has an optical speed sensor and hasn't been cleaned for a while, dust dirt or lint may be obstructing the
infared eye of the speed sensor. Try cleaning the treadmill.
Also check with hebb on what an error 1 is. I bet it's speed sensor related.
You can reach me here for more help.
www.mindbites.com/lesson/377-maintaining-your-home-treadmill-revised
or here markepeterson@austin.rr.com
Mark Peterson, March 2008