While you wait for answers, we may have found some information which could help you.
Click here for Sears Model TimeMy Proform Sears Treadmill no longer inclines?
How can I calibrate a free spirit treadmill?
Calibrating Sears Freespirit Mod.# 122 300811?
Question on Proform 545s Treadmill?
Sears Free Spirt Club Treadmill L5 Error?
Treadmill Incline voice?