Fitbit Wearable Error Code 15: How to Fix It

Easy 15-30 minutes Medium Severity Verified June 2026
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Error Code
15
Brand
Fitbit
Product Type
wearable
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Fitbit Error Code 15 indicates that your Fitbit device requires a factory reset to resolve an internal firmware or software conflict it cannot recover from on its own. This typically appears after a failed sync, a corrupted firmware update, or persistent freezing that a simple restart cannot fix. While a factory reset will erase all data stored locally on the device, it is the most reliable way to restore normal operation — and your synced data is safely backed up in the Fitbit app.
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Tools You'll Need

How to Fix Error Code 15

  1. Sync Your Fitbit Data First

    A factory reset permanently erases all locally stored data on the device. Data that was never synced to the Fitbit app cannot be recovered after the reset.

  2. Attempt a Soft Restart First

  3. Locate the Factory Reset Option on the Device

  4. Factory Reset via the Fitbit App (Alternative Method)

    Removing the device from your account as part of the reset will unpair it from your phone. You will need to go through the setup process again afterward.

  5. Place Device on Charger During Reset

    Do not remove the device from the charger or power off the USB source while the reset or a firmware update is in progress.

  6. Re-Pair and Set Up Your Fitbit

  7. Verify Error Code 15 Is Resolved

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When to Call a Professional

If Error Code 15 returns immediately after a successful factory reset and fresh setup, this points to a hardware-level fault — such as corrupted onboard storage or a failing processor — that cannot be fixed through software. In this case, contact Fitbit Support directly at support.fitbit.com to check your warranty status. Fitbit devices are generally not user-serviceable, so a warranty replacement or out-of-warranty exchange through Fitbit's official support channel is the appropriate next step. Do not attempt to open the device, as this will void any remaining warranty.

Frequently Asked Questions

Will a factory reset delete all my Fitbit data?
A factory reset erases data stored locally on the device itself, but any data that was previously synced to the Fitbit app is saved to your Fitbit account in the cloud and will not be lost. To protect any recent unsynced data, manually sync your device in the Fitbit app before performing the reset. After you re-pair the device, your historical data will still be accessible in the app.
Why does my Fitbit keep showing Error Code 15?
Error Code 15 typically appears due to a corrupted firmware update, a software conflict, or an internal system crash that the device cannot self-recover from. It can also be triggered by a failed sync or low battery during a firmware update. A factory reset resolves the issue in most cases by wiping the corrupted software state and allowing the device to start fresh.
How do I factory reset a Fitbit Versa or Sense specifically?
On Fitbit Versa and Sense models, swipe left on the clock face to access the app menu, then open the Settings app. Scroll down and tap 'About,' then select 'Factory Reset' and confirm your choice. If the touchscreen is unresponsive, you can also use the Fitbit app on your phone: go to your profile, select the device, and choose the option to remove or reset the device.
Can I fix Fitbit Error Code 15 without losing my data?
Unfortunately, a factory reset is required to clear Error Code 15, and it does erase local device data. However, all data that has ever been synced to your Fitbit account is preserved in the cloud. Your best protection is to sync the device immediately before resetting it. Once you re-pair the device, all your historical activity, sleep, and health data will still be visible in the Fitbit app.
What if my Fitbit shows Error Code 15 after the factory reset?
If Error Code 15 reappears after a complete factory reset and fresh device setup, this strongly suggests a hardware fault rather than a software issue. At this point, DIY solutions are unlikely to help. Contact Fitbit Support at support.fitbit.com to report the issue. If your device is within the warranty period (typically one year from purchase), Fitbit may offer a free replacement. Out-of-warranty options include a paid replacement or discount on a new device through Fitbit's support program.

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