HR Sensor stops working after 12 hours

9857406 8 days ago

Hi,

I am wondering if anyone can help me with a strange issue I am having with the HR sensor on my Fenix 7 solar. It seems to stop working after 12 hours. Here is how can reproduce it:

- heart rate sensor stops working (green lights still flashing but only last recorded heart rate is shown and does not update)

- I do the "software" reinstall thing (hard resets does not fix it) and the HR sensor will work and record as usual and then after 12 hours, it just stops again.

I am on software: 22.06 and all this all seemed to have started.after I updated a few days ago. Here is a screen shot showing it. I am hoping there is a setting that I am overlooking somewhere.

I reinstalled the software around 12midnight and then by afternoon the next day it stops updating and only records the last reading before the failure. All power saving settings are off. I am hoping there is a setting that I am overlooking somewhere as it seems to stop every 12 hours and doesn't come back until I do the reinstall in the about menu.

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0 socorsu 8 days ago

Do you know since how many you encounter this issue ?

the next version actually under beta is providing a minor release for WHR, maybe you can try it to check if it stabilize your sensor ? And it will be upgraded with a different version

0 9857406 7 days ago in reply to socorsu

I basically started to encounter this issue since I updated my watch early-mid July. I just enrolled into the beta program and installed the latest beta firmware to see if this issue is fixed.

0 9857406 6 days ago

I loaded the beta firmware and the HR sensor started to work again. This time it lasted a bit longer but still failed(~18 hours). Anyone have and other ideas I can try?

0 trux 6 days ago in reply to 9857406

I would try the master reset to factory defaults with deleting all data, and see whether it changes, before starting to customize the settings, or installing any CIQ apps. If it does not help, then it may be a hardware problem, for example a swollen battery pressing against the sensor, a connector problem, or similar. You could test whether shaking the watch, or cooling / warming up the watch has any impact like triggering the failure, or making it work again.

0 9857406 5 days ago

I downgraded my firmware to 21.19 and my HR sensor has been working normally for about 24 hours now. Maybe there is something in the 22.06 (that carried over to the 23 Beta) that my watch's HR sensor simply didn't like. I will keep monitoring it to see if this firmware downgrade restored my HR sensor

0 trux 5 days ago in reply to 9857406

Downgrading the firmware, resets the watch to factory defaults, so I guess it was rather that that fixed the issue (if it is really fixed). You can try upgrading to the recent version again, and see whether the HR sensor keeps working.

0 9857406 4 days ago in reply to trux

ok, I just updated back to the latest beta to give it a shot. Hopefully it holds.

0 9857406 1 day ago

So, it happened again:

I am on the latest beta, and will now revert back to an older firmware to give it shot again. The one thing that I am noticing is that every time the HR sensor freezes, it is always at the same time of day.