I am having trouble with my Bowflex TC5000. The calibrations is failing. The treads aren't moving but the monitor is trying to calibrate.

https://www.fixya.com/support/t2438337-bowflex_treadclimber_calibration_failed

https://www.manualslib.com/manual/612664/Bowflex-Treadclimber-1000.html?page=34

https://manualzz.com/doc/871362/bowflex-treadclimber-1000-service-manual

Hi.

Please click on the link to view how to calibrate the treadmill.


https://www.manualsdir.com/manuals/58333/bowflex-treadclimber-5000-treadclimber-3000-treadclimber-1000.html?page=33


Kind regards.

Try again RUN the software calibration. and adjust the REED SWITCH, and Speed Sensor, test it, clean it, and tight the plug or connector from UPPER board vs lower board.
God bless you

adjust the REED swtch, and speed sensor, test it, clean it, and tight the plug or connector.
2) Tight the upper cable vs lower cable
3) Tight the ribbon cable for keypads
4) Run again the s. calibration.
God bless you

1= do not panic
2= Lube the deck belt
3= lube the roller bearing
4= adjust the REED switch see the diagram attached, clean and tigh the wires connector very well
5= lube the motor elevation very well gear and shaft.
6= adjust the potentiometer of elevation motor,
7a readjust again the speed sensor, see the diagram attached,clean it and tight wires connector very well.
7= Run again the software calibration for diagnose and troubleshooting
see the block diagram and fix it , maybe the main motor board is faulty, test it with the RUN s.calibration. God bless you

DEAR
AT FIRST YOU MUST REMOVE COVER AND SEE CAREFULLY TO FIND SENSORS SOME SENSORS ARE PHOTO SENSOR AND GET ON DUST AND CAN NOT GOOD WORK THEN BETTER THIS IS YOU CLEAN DUST VERY VERY GOOD PERHAPS SOLVE YOUR PROBLEM.
you can countiue contact us with smart phone on wattsapp or telegram by :
+989195116738

Call manufactor for calibration procedure. If this doesnt work, you will probably need a lower board.

Unplug your machine, restart it and try to calibrate it one more time. I had to do this with mine and it did take more than one try to get it to recalibrate again.

Had my TC5000 for a year and this is the first time this happened. I use it everyday. Googled "Bowflex Teadclimber error codes" and found this link  download.dfxi.com/supportdocs/AM/Bowflex/BFX_TC135_AM_2008.pdf which is a pdf manual. 
I'm going to try this fix now, hope it works for you and me
Here's what it says for ERR LS:
Belts stop turning and “err LS” or “err OS” is displayed Calibration Re-calibrate machine using Owner’s Manual calibration procedure. Speed sensor 1. Cycle power off and on. 2. Put the machine in calibration mode (see Calibration procedure in Owner’s Manual) but do not start the calibration routine. 3. Remove right rear plastic cover to view LED diagnostics on control board. Caution: Machine is on. Current is active!! 4. Locate LED D on the motor controller board. LED may be lit or unlit. 5. Manually advance the treadle with your foot, and check if LED D is blinking. 6. If LED D is not blinking, then the speed sensor is not supplying a signal. Check that the speed sensor wire is plugged into the motor controller board, to the connection labeled “P1”. Check connection of speed sensor to jumper wire. Check speed sensor adjustment (use business card to set gap between sensor and pulley). If LED D still does not flash replace sensor. I/O cables If LED D is flashing when the belts are turning but err LS or OS persists check connections and for signs of visible damage to any of the three I/O cables. If no damage, check continuity using a multi-meter. If a multi-meter is not available contact customer service for replacement cables and further assistance.
Mike

Check the speed sensor and make sure it is no farther than a credit card away from the drive pully. Unplug unit Located...remove left and right rear covers and back cover. 3 screws in each and 4 screws in back. Follow 2 black wires up to drive belt pulley under back of left treadle. slide sensor in with cc between it and the pully. Recalibrate