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    Heart Rate Measurement stops

    Scheduled Pinned Locked Moved Suunto 9 Peak Pro
    suunto 9 peak pro
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    • Thaisa LaffitteT Offline
      Thaisa Laffitte
      last edited by

      since I bought the problem was persistent just one day per week. But know atfter the updated 2.39.20, is even worse, everyday I have to reset.

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      • Brad_OlwinB Offline
        Brad_Olwin Moderator
        last edited by

        A fix now for this and working for me.
        https://forum.suunto.com/topic/12340/new-update-2-39-34-9-peak-pro

        Vector/T6c/Vertical 2 Ti

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        • A aa2010 referenced this topic on
        • A Offline
          Aynrnd @claenn
          last edited by

          @claenn I just followed arkaitgavan’s instructions to change the software and I selected the 2.39.34. That was the only other option for software. The previous software was 2.39.20. I was having the same issues with the watch not measuring sleep and not measuring heartrate without a soft reset at least once per day. Fingers crossed. Stay tuned

          M 1 Reply Last reply Reply Quote 0
          • Jan H. 0J Offline
            Jan H. 0
            last edited by

            Just to add, I am having the same issue of the optical HR sensor crashing with my Race S (2.39.20). 2.39.34 is not yet available for this watch. Thanks @arkaitzgalvan for the instructions on how to go back to the previous firmware as it didn’t happen before the update.

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            • M Offline
              magbueno @Aynrnd
              last edited by

              @Aynrnd , as said in the Suunto app the new version is a downgrade to a previous version of the software to fix a critical issue caused by the latest update. This software is practically the same version as 2.37.48.
              If your 9PP was fine before, It should be fine now.
              Good luck!

              A 1 Reply Last reply Reply Quote 0
              • A Offline
                Aynrnd @magbueno
                last edited by

                @magbueno Great news! The 2.39.34 software update fixed my problem!

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                • Jan DuerinckxJ Offline
                  Jan Duerinckx
                  last edited by

                  I had similar problem with with my 9PP running software version 2.48.16 and now after the upgrade to version 2.50.28 still: out of the blue the heart rate monitor LED lights stop working. Only after switching the watch off and on again, it reactivates. I want to track my sleep and HRV and the failure happens most often at night messing up the statistics.

                  Anyone knows a sustainable solution? Much appreciated.

                  Charles LanahanC 1 Reply Last reply Reply Quote 0
                  • Charles LanahanC Offline
                    Charles Lanahan @Jan Duerinckx
                    last edited by

                    I am running into the same issue on my suntoo 9pp with the 2.50.28 version :'-(

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                    • O Offline
                      Oxhill_Runner
                      last edited by

                      I also have the same issue. 9pp running 2.50.28 and many times over the last year or more wrist heart rate stops. Green leds not flashing. Turn off turn on to fix but you only realise it’s stopped when you synch in the morning.

                      Night sleep, recovery all inaccurate.

                      I have no good reason to buy Suunto again ☹️

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                      • T Offline
                        Techlysmic
                        last edited by

                        Same problem as other recent users. Running 2.50.28 and HR monitor stops working. Can’t turn HR function off and back on, have to do a soft reset. The issue seems to have started (for me anyway) about a month ago, but has been increasing in frequency each week. I thought this was resolved way back in 2.39.20? It’s the same behavior at least.

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