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Heart rate and accelerometers stopped working

kmac503
over 5 years ago

The optical heart rate sensor and accelerometer appear to have stopped working on my Forerunner. If I perform a soft reset on the watch, the optical heart rate will start working again but it stops within an hour. I can tell from the heart rate graph in the Garmin Connect app that it's cutting out. It definitely isn't just failing to read – I can look at the watch on my wrist and the green light does not illuminate. It also isn't tracking steps throughout the day. And when I record a run, neither heart rate monitor nor cadence are recorded. 

I recently updated my watch, the Firmware version is 4.00 (17bdab6) – I've also installed the most recent Sensor Hub update. If I connect an ANT+ sensor, I am able to get heart rate readings. I don't have any widgets installed on the watch. Has anyone else had this issue and know of a solution? 

Thanks! 

Kyle

  • 0 over 5 years ago

    It's possible a file has gone corrupt.  It wouldn't hurt if you try the 4.06 beta to rewrite the files.  No guarantees, but like I said, it wouldn't hurt and you can always revert back to 4.00.

  • 0 over 5 years ago in reply to tess

    Thanks Tess. I tried updating to 4.06 and that doesn't seem to have made a difference, unfortunately! I've emailed Garmin support to see if it could be a hardware issue. The watch is less than a month old, so I suppose it could be a production issue. 

  • 0 over 5 years ago in reply to kmac503

    Same error for me (no lights and versions are 0.00 in the system). but after few hours everything worked again. And since the error randomly appears.

    Hard reboot the watch or plug it to Garmin express with a sensor reinstallation seems to correct the error temporarily.

    I emailed Garmin too, I suspect an update doing it because my HRM run sensor is affected by a new error in the same time (battery drain).

  • Former Member
    0 Former Member over 5 years ago

    Hi im have the same problem. I reset my watch and isnt work. I dont know what to do.
    Help!

  • Former Member
    0 Former Member over 4 years ago

    I have the same problem.. since i update my watch to version 4.7 the heartrate sensor didnt work well, the green light does not iluminate.. how its a hard ware error or just software error?

  • 0 over 4 years ago in reply to Former Member
    since i update my watch to version 4.7

    The last FW release is 4.40.  If I hard restart doesn't solve it you may have a corrupt file.  Have you tried the new beta 4.87?  

  • 0 over 4 years ago in reply to tess

    Not for APAC. Ref https://www.garmin.co.in/products/wearables/forerunner-945-black/#updateTab 

    Latest Version2020-07-14。

    Version : 4.70 New!

    1. Improvements to Payment.

    Version : 4.60

    1. Improvements to OWS.
    2. Improvements to Payment.

    Version : 4.50

    1. Improvements to GPS
    2. Fixed training modes (workouts, intervals, set a target, etc.) in Virtual Running to allow connection to phone app
    3. Changed filtering of activities for Race an Activity. List of activities is now narrowed to those within the same general sport type.
    4. Fixed missing auto-run setting in Ski
    5. Improvements to rep-counting
    6. Improvements to floor-climb when the user is jogging up/down stairs
    7. Added SkiSkate profile
    8. Added BackCountry Ski profile
    9. Improvements to music playback/sync/providers
    10. Improvements/fixes to payments
    11. Made several improvements to Breathwork
    12. Made several WiFi related improvements
    13. Fixed an issue where the device would always display the 'Updating' spinner when changing an alarm
    14. Various other fixes and improvements
    15. Add Cantonese audio prompt(Only for China)
    16. Fix CIQ app string truncated issue.
    17. UI improvement.