To initiate the calibration routine, hold down the SPEED + button and the SPEED - button simultaneously for three seconds. During the calibration routine, the INCLINE TRAINER will automatically rise to the highest incline level and then return to the lowest incline level.
P.S. This is listed in your user manual in the "Troubleshooting" section if you don't have a user manual then you can get a pdf copy of it here http://www.ereplacementparts.com/images/nordictrack/CTK59020.pdf
Answers & Comments
To initiate the calibration routine, hold down the SPEED +
button and the SPEED - button simultaneously for three seconds. During the calibration routine, the INCLINE
TRAINER will automatically rise to the highest incline level and then return to the lowest incline level.
P.S. This is listed in your user manual in the "Troubleshooting" section if you don't have a user manual then you can get a pdf copy of it here
http://www.ereplacementparts.com/images/nordictrack/CTK59020.pdf