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Sense 2 keeps getting stuck in boot mode

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‎02-16-2026 14:07 - last edited on ‎02-16-2026 15:03 by Fitbit Moderator

‎02-16-2026 14:07 - last edited on ‎02-16-2026 15:03 by Fitbit Moderator

Quite often lately when I try to run the ECG it goes into a boot loop and the only way to get it out is to fully charge.  I updated to the latest firmware last week, hoping that was the issue, but the issue persists. Today my watch stopped syncing with my phone and went into a boot loop and the battery was at 56%, so it's not like it was about to die. The issue only started last week, I've never had this issue before. 

 

Moderator edit: clarified subject.

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3 REPLIES 3

‎02-16-2026 15:03

‎02-16-2026 15:03

A warm welcome to the community forums @DWalline. 

Thank you for providing the details regarding the difficulty that you are experiencing with Sense 2.

Before considering other options, I suggest you to confirm that you are using the latest version of the Fitbit app: How do I use the Fitbit app?

In addition, try to perform the following steps:

1. Sync the device in the Fitbit app.

  • From the Today tab in the Fitbit app, tap Devices.
  • Chooose the Sense 2.
  • Tap Sync Now.

2. Check for available Firmware updates.

  • With the Fitbit device nearby, open the Fitbit app (make sure the Fitbit device is charged).
  • Tap the Today Tab > Devices > your device.
  • Tap Update (This option only appears if an update is available).
  • Follow the on-screen instructions: Keep the Fitbit device close to your phone during the update. When the update starts, a progress bar appears on the device and in the Fitbit app until the update is complete.

3. Charge the device:

  • Double-check the connection: Ensure secure connection to the charging cable and that the cable is plugged into a working USB port (computer or UL-certified wall charger).

If these steps don't work:

4. Restart the device: Keep in mind that your data won't be deleted: How do I restart my Fitbit device?

5. Changing the clock face via the Fitbit app can sometimes resolve a black screen issue:

  • Open the Fitbit app.
  • Choose Device Settings.
  • Navigate to the clock face options and try selecting a different clock face.
Best Answer

‎02-20-2026 01:41

In response to ManuFitbit

‎02-20-2026 01:41

I contacted support and after trying multiple things, they determined the sense2 was unrecoverable, and offered me a discount on a new watch. Unfortunately the code was only good on Fitbit watches not the newer Google watches that I wanted to upgrade to. 

Best Answer

‎02-21-2026 12:24

In response to DWalline

‎02-21-2026 12:24

@DWalline, thanks for the update. 

I totally get how you feel. I'm sorry that this discount doesn't cover the device you're looking for.

Thanks so much for contacting our Support team. If you have any other questions about your watch, feel free to keep in touch with them—they’ll be happy to help.

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