Heart rate sensor - lights stopped working, whr 0.00.00

Hi all,

my vivoactive 4S is a little over 3 years old now and started experiencing some issues. 

After doing a deep clean, factory reset and the newest software update, most issues disappeared. Slight smile

One new issue that appeared is that the green lights of the heart rate monitor stopped working. 

In settings, all heart rate related things are turned on so that can't be it. 

When looking at the software update, it states the following:

  • software version: 7.8
  • gps: 6
  • ANT: 8.0
  • wifi: 2.6
  • sensor: 0.0
  • WHR: 0.00.00

These final two are worrying.

I did try the garmin express and got a notification that a new sensorupdate has been done but still shows the 0 versions.

As i'm in the middle of a training program i can't afford to not register any heart rate or to lose my watch for a couple of weeks.

anyone know any tips or tricks can help?