Reset Your Fitbit Blaze in Three Steps

To reset your Fitbit Blaze to factory settings, hold down the back button (the small button on the left side of the watch) for about 10 to 15 seconds until you see the Fitbit logo appear on the screen. Release the button and wait for the device to restart. The entire process takes less than a minute, and your watch will return to the state it was in when you first unboxed it.

A factory reset clears all your personal data, including activity history, heart rate logs, and any custom watch faces you've added. Your Fitbit Blaze will no longer be paired with your phone or account. This is useful if you're troubleshooting a frozen screen, preparing to sell or give away the device, or starting fresh after a software glitch.

Key Takeaways

  • Hold the back button on the left side of your Fitbit Blaze for 10 to 15 seconds until the Fitbit logo appears, then release.
  • A factory reset removes all your personal data, activity history, and account pairing from the device.
  • You can re-pair your Fitbit Blaze with the Fitbit app on your phone after the reset is complete.
  • If your Blaze is frozen or unresponsive, a reset often fixes the problem without needing to contact support.

What Happens During a Factory Reset

When you perform a factory reset, your Fitbit Blaze erases all stored data and returns to its original software state. This includes your step counts, sleep records, heart rate measurements, and any personal settings you've configured. The device will no longer remember your height, weight, age, or gender — information you entered when you first set it up.

Your Blaze will also disconnect from your Fitbit account and your phone. If you've synced the device to multiple phones or accounts over time, those connections are all severed. After the reset, the watch displays the same welcome screen you saw on day one, and you'll need to pair it again with the Fitbit app to use it.

When to Reset Your Fitbit Blaze

Reset your Blaze if the screen freezes, the device stops responding to button presses, or the watch won't sync with your phone despite multiple attempts. A frozen Blaze often becomes responsive again after a reset, and it's the first troubleshooting step Fitbit support recommends before exploring other options.

You should also reset the device if you're selling it, giving it away, or trading it in. A factory reset ensures the new owner starts with a clean device and that your personal activity data doesn't remain on the hardware. If you've forgotten your Fitbit password or want to switch to a different account, a reset followed by re-pairing with a new account is the standard approach.

How to Re-Pair Your Blaze After a Reset

After your Fitbit Blaze restarts following a factory reset, open the Fitbit app on your phone and tap the profile icon in the bottom right corner. Select "Set Up a Device" and choose Fitbit Blaze from the list of available devices. The app will search for your watch and display it by name once it finds it.

Tap your Blaze's name to begin pairing. Follow the on-screen prompts to enter your height, weight, age, and gender. The app will then sync your account information to the watch, and your Blaze will be ready to use. This process typically takes two to three minutes, and you'll see a confirmation message once pairing is complete.

Troubleshooting If the Reset Doesn't Work

If holding the back button for 15 seconds doesn't produce the Fitbit logo, try charging your Blaze for at least 15 minutes. A device with very low battery sometimes won't respond to the reset command. Connect the watch to its charging cable, wait, and then attempt the reset again.

If the logo still doesn't appear after charging, try holding the back button for up to 20 seconds instead of 15. Some Blaze units require a slightly longer press. If the watch remains unresponsive after multiple attempts, the device may have a hardware issue that requires replacement. Contact Fitbit support with your device serial number, which you can find in the Fitbit app under your device settings.

Backing Up Your Data Before a Reset

Your Fitbit Blaze automatically syncs your activity data to your Fitbit account whenever the watch connects to your phone. If you want to preserve your historical data before performing a reset, make sure your device has synced at least once in the past week. Open the Fitbit app, tap your profile icon, select your device, and scroll down to confirm the last sync date.

Once you've confirmed a recent sync, your data is safely stored in your Fitbit account and won't be lost when you reset the watch. After you reset and re-pair the Blaze, your historical data will reappear in the app. The watch itself won't display old activity logs, but your account will retain the complete record.

Frequently Asked Questions

Will I lose my activity history if I reset my Fitbit Blaze?

Your activity history is erased from the watch itself, but it remains in your Fitbit account as long as you synced before the reset. After you re-pair your Blaze, your historical data reappears in the app. The watch won't show old step counts or sleep records, but your account keeps the full record.

How long does a factory reset take?

The reset process itself takes less than a minute from the moment you hold the back button until the Fitbit logo appears and the device restarts. Re-pairing with your phone takes an additional two to three minutes. The entire process from start to finish is usually complete in five minutes.

Can I reset my Fitbit Blaze if it's not charged?

A Blaze with very low battery may not respond to the reset command. Charge your watch for at least 15 minutes before attempting a reset. A device with adequate battery power is more likely to complete the reset successfully.

Do I need to unpair my Fitbit Blaze before resetting it?

No. A factory reset automatically disconnects your Blaze from your account and phone. You don't need to unpair it first through the app. After the reset, the device is completely disconnected and ready to pair with any account.

What if my Fitbit Blaze is stuck on the Fitbit logo after a reset?

If the logo appears but the device doesn't finish restarting, try charging the watch again and waiting a few minutes. If it remains stuck, hold the back button for another 10 seconds to attempt a second reset. If the problem persists, contact Fitbit support with your device serial number for further information.