Possible sensor issues Fenix 6s Pro

Hello Pippa

I am sorry to hear you are having trouble with the HR sensor. For this, I would recommend some troubleshooting steps. 

• Ensure the watch is not in battery saver mode: 
  1. Hold the menu button
  2. Select Power Manager
  3. Select Battery Saver
  4. Ensure status is Off
• If the green HR lights on the back of the watch are not lighting, ensure this is enabled in the watch menu: 
  1. Hold the menu button
  2. Select Sensors and Access
  3. Select Wrist HR
  4. Ensure this is set to Auto
• If it is enabled, try toggling it off then on again. 
• If there is not change, try a hard reset. For this, hold the Light button until the watch shuts off, as opposed to selecting power off. Then power this on again. 
• If there is still no HR or steps being recorded, check to see if the sensor software versions are present in the watch. Menu, System, About, Scroll down. If the WHR, BMX of Sensor Hub versions are showing as 0.00, this would indicate these sensor software is missing, and may be able to be reinstalled. 

You can try reinstalling this using Garmin Express. 

1. Download and launch Garmin Express http://software.garmin.com/en-US/express.html
2. Connect the device with the USB cable
3. Click + to add a new device
4. Once found sign into the Garmin connect account
5. Register device if needed
6. If software update is found, click install
7. Select Tools and Content
8. Select the Utilities tab
9. Select additional updates
10. If the sensor versions are available, select to install these
11. Disconnect the device and power on to complete

If you concern is still occurring after these steps have been completed, it is likely the watch will need to be replaced. You will want to contact Garmin Product Support.