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My polar cs100 speedo hrm battery went flat, new battery installed at shop. Display now reads 9999 and wont reset

Posted by TMorrison on

  • 2 more comments 
  • Anonymous Dec 21, 2007

    Same deal - replaced the battery on my CS100 and now it just shows "8000" and won't do anything else, now matter how many buttons i push and resets i do

  • cycle path Mar 14, 2008

    ditto, new battery and now the unit will not reset, display reads "9999" and when I push the left buttom the unit turns off and then comes back on and reads "9999"

  • mark_h8it Apr 18, 2009

    1 - changed battery,

    2 - hold 3 buttons per manual to reset - OK

    3 - press any button

    4 - Display goes to 9999 with no response other than repeat (2,3,4)

  • mowi May 17, 2009

    Same for me. Battery change on CS100, Display now always shows 9999. 3 Button Reset works, but aftwerward again 9999 on display. Any solutions yet?



5 Related Answers


  • 1 Answer

SOURCE: Heart rate monitor reading "lo"

to shutoff HR out of range alarm - when selecting the ranges in the HRM Steup mode - press the START/SPLIT button to toggle the alarm on and off. (use the start/stop button on the pro fitness model). page 14 in my manual

Posted on Jan 19, 2009


Arturs Kalnins

  • 2338 Answers

SOURCE: Which way round does the battery go in a Polar FS1

Battry must go - (minus) into the movement and +(plus) facing up. As battery replacement must be done with watch upside down, you must see the +(plus) on battery when it is inserted into the movement and the fit the contact over it.

Do not forget to rate, please.

Posted on Mar 11, 2009



  • 1 Answer

SOURCE: Polar CS 200 chest strap

For two years I had a problem where the monitor was presenting me with ridiculously high values, like 122% max heart rate. This typically happened on downhills or whenever I exceeded 25MPH (OK only downhills). One day when wearing a windproof vest, I noticed that it didn't happen. I then placed SaranWrap over the front of the chest strap to completely block the wind and it also worked. Then I discovered (while reading the Polar manual about HRM maintenance) that the problem might be that I rarely washed the unit. (Don't understand how this manifests itself as it does, but...) After I washed it as directed, the problem went away, so now I wash after most rides. Fast forward 4 months and the problem has returned, but usually only in the first part of the ride and I don't have to be going as fast. I dabbed on some water which didn't help and the next time added a few grains of salt to a few dabs of H2O. Problem still there. Now I'm trying the SaranWrap method to see if this will help, but as of yet, I can say that wrapping up only the central plastic part of the chest strap doesn't help. More experiments on the way.

Posted on Sep 14, 2009



  • 347 Answers

SOURCE: I am looking for a

The Polar S-410 uses the same watch band as all the other S-Series bands so you can replace with any of them. S120, S150, S210, S410, S520, S625, S725. S810 all work fine.

To get the exact replacement you can contact one of the Polar Authorized Service Centers, and they can send one to you, I seem to remember they are under $15-.

You can also change the watch band style entirely and go with a Velcro style sports band, they are readily available at stores like REI and other sports/ mountain type shops. Take your watch with you to match the width of the original band at the head.

Posted on Nov 19, 2010


Joe A

  • 396 Answers

SOURCE: Manual required to install beto child seat cs-100

Try this and see if it works for you. I think yours may be a CS-001.
Beto Child Seat Instructions

Posted on Apr 30, 2012

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Professional battery installation, doesn't turn on, is there a power on button? Or do I need to take it back and have them try again?

There are only a few Authorized Polar Service Centers. If you did not take it to one of these (which provide a 90 day warranty) they may have broken something or put in the wrong battery.

Polar and other HRM's are mini computers and actually quite delicate inside, they are not normal watches and while many watch repair places profess to be able to fix them, more often than not they cause a new problem. They are also repressurized with a special machine to keep them watertight, your watch is most certainly not watertight anymore and will eventually cause yoiu problems.

Too answer your question, no power on switch, if the battery install was good you would see a display. Take the watch back to the shop, and if they can not fix it, send it to Polar and then have the shop reimburse you for the repair. Polar will be happy to send them a detailed and Itemized account of what they had to fix.

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