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An LS 6 error on a Bowflex treadmill - I put in a new speed sensor and recalibrated. The tread stops moving but everything else keeps working. I can turn it off for a minute and turn it back on, it will start up again but then stop again after a few minutes.

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Sounds like the speed sensor may be intermittently losing the speed signal. You use a business card slipped between the pulley and the speed sensor to set the gap- push the sensor against the card, then remove the card. That should insure a good speed signal.

Posted on Aug 04, 2014

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Posted on Jan 02, 2017

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SOURCE: Err LS on Bowflex Treadmill

The machine needs to be re-callibrated. L5 error.
Your speed sensor must have been damaged either during shipping or use. You'll need a new one. If under warranty - give Bowflex a call. They will ship you out a new sensor and guide you through installing it via the phone... re-calibrating the machine... and getting it operational again. It will take about 2 hours.

The instruction book doesn't mention calibration. be sure to not callibrate in metrics, however (there's no way to easily tell the difference - you have to ask) or you'll be strolling like a walk in the park at 5 "mph".

Thanks for using FixY - a FixYa rating is appreciated!!

Posted on Feb 21, 2009

vpaaf
  • 115 Answers

SOURCE: 9100 life fitness treadmill

Sounds like you need a new lower board replacement. You can get that for that treadmill by call lifefitness or sportsmith.com Please rate me good

Posted on May 01, 2009

  • 64 Answers

SOURCE: Treadmill runs then stops. E1 error and sometimes works fine.

Yes if speed sensor is too far from magnet it will not pick up belt movement. This confuses the computer and as a safety precaution it shuts the machine off. Find speed sensor and check for proper alighment with magnet.

Posted on Jun 08, 2009

  • 1 Answer

SOURCE: E2 error codes shows on my Pro Form 730 si treadmill

Did you find a solution for this issue? I have a similar situation

Posted on Oct 14, 2009

  • 4 Answers

SOURCE: My Freespirit also stops after a few minutes

Normally all these problems are in relation with motor itself, I mean, internal bearings, short circuit. So if your treadmill stops is bacause the circuit board detetecs an over current fron motor.

I hope help you

Posted on Nov 05, 2009

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If you wish to get some details about treadmill repair and service ; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

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HI our Bowflex series 3 treadmill is giving us a continued Err L5 code when trying to use our machine. We bought it used so do NOT have ant trouble shooting instructions. Any advice?


Hi There, L5 error should refer to the "LS" error which looks up to a speed problem. When you start the machine up, it boots fine and then when you press start or go is says err ls ? If the walking belt doesn't move at all when you try to start it, listen for a "Click" on that lower board when start is pressed..... If the walking belt moves for a second and then stops and the console says err ls, then you may have a speed sensor problem. These control boards are repaired by Jatinah Electronics who can be found with a google search. Good Luck!

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The belt won't move, Err-L5 keeps on coming on what seems to be the problem can u help me Pat Morelli


L5 or LS is short for Low Speed error

It basically means that the speed sensor is not picking up a signal. Unfortunatley its a pretty vague error code and can be caused by several different problems.

First you have to determine wether or not you have belt movement. If you have a LS with belt movement you know that it is related to the speed sensor itself (or the MCB motor control board - the part of the MCB that handles speed sensing function). If you are getting an LS w/belt movement you have to check to see if you have power output from the MCB. If you have no power output, check fuses, if fuses are good you will need the MCB replaced.

Hope this helps (remember to rate this answer).

Jun 09, 2011 | Bowflex Series 3 Treadmill Msrp 129999

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I have an L5 error on the display. Belt not working. What do i do?


This is a LS or speed sensor error, it can be caused by a belt that is too tight, non lubricated walking belt and or a bad sensor. If the belt does not move at all, Bowflex will tell you to buy a new lower control board. $227 direct from them (Nautilus)

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My Bowflex Treadclimber keeps coming up with an Error L5. This error message shows up 5 seconds after turning the machine on. My husband looked it up yesterday and said that the machine needs to be...


L5 due to the screen is actually LS (lost signal) the first place to check is the gap of the speed sensor. under left treadle 2 black wires. Removing the rear covers will allow you to see the lwr cntrl board and move the belt by hand. The gren led light should flash once per revolution of the drive pulley. If not then it is the speed sensor. Adjust sensor to pully about thickness of a credit card. then calibrate unit.
LS is also tripped by any broken wires or bad connections. Start at sensor and board first.

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Err LS on Bowflex Treadmill


The machine needs to be re-callibrated. L5 error.
Your speed sensor must have been damaged either during shipping or use. You'll need a new one. If under warranty - give Bowflex a call. They will ship you out a new sensor and guide you through installing it via the phone... re-calibrating the machine... and getting it operational again. It will take about 2 hours.

The instruction book doesn't mention calibration. be sure to not callibrate in metrics, however (there's no way to easily tell the difference - you have to ask) or you'll be strolling like a walk in the park at 5 "mph".

Thanks for using FixY - a FixYa rating is appreciated!!

Feb 21, 2009 | Bowflex Treadmill Series 7

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