A Fire Stick that keeps restarting usually has a problem with power, heat, storage or software. Plug it into a wall outlet with the adapter that came in the box, let it cool, and install the latest update. If that doesn't stop it, a factory reset is the last fix to try.
Why Does a Fire Stick Keep Restarting?
A Fire Stick is a small computer. Like any computer, it shuts down and starts again when something goes wrong inside it. Most of the time, the cause is simple and you can fix it at home.
Here are the most common causes:
- Weak power: the stick gets its power from a TV USB port instead of a wall outlet.
- Overheating: the stick is stuck behind the TV with no room for air.
- Full storage: there is too little space left for the system to run well.
- Old software: Fire OS, the system that runs the stick, is out of date.
- A bad app: one app crashes and takes the whole system down with it.
- HDMI-CEC conflicts: the TV and the stick send each other mixed-up on and off signals.
Fire OS is built on Android, and Android runs on the Linux kernel. The kernel is the core part of the system that manages memory and hardware. You can read more about how Linux-based systems work at Linux.com.
Quick Comparison: Causes, Signs and Fixes
Use this table to match what you see on screen with the most likely fix.
| Cause | What You Notice | Easy Fix | Difficulty |
|---|---|---|---|
| Weak power | Power warning on screen, or a restart right after the logo | Use the box adapter and a wall outlet | Very easy |
| Overheating | Stick feels hot, restarts after long use | Use an HDMI extender and let it cool | Very easy |
| Full storage | Slow menus, apps close on their own | Clear cache and remove unused apps | Easy |
| Old software | Random restarts, bugs after an app update | Install the latest Fire OS update | Easy |
| Bad app | Restarts only when one app is open | Clear that app's data or uninstall it | Easy |
| HDMI-CEC conflict | Screen goes black or TV switches inputs | Turn off HDMI CEC Device Control | Easy |
| Deep system error | Restarts keep coming back after every fix | Factory reset | Medium |
Step 1: Check the Power Supply
Power is the number one cause of restart loops. Many TVs have a USB port, but it often can't give the stick enough power. When power drops, the stick shuts off and boots again.
- Unplug the stick from the TV's USB port.
- Connect it to the power adapter that came in the box.
- Plug that adapter straight into a wall outlet, not a cheap power strip.
- Use the original cable. Some phone cables can't carry enough power.
If you saw a message about low power before, it should go away now.
Step 2: Let It Cool Down
A Fire Stick has no fan. It gets rid of heat through its case. When it sits tight behind a warm TV, heat builds up and the stick may restart to protect itself.
- Unplug the stick for 10 to 15 minutes so it can cool.
- Use an HDMI extender cable to move it away from the back of the TV.
- Keep it away from vents, lamps and other hot devices.
Step 3: Clear Storage and App Cache
When storage is almost full, the system has no room to work. Apps may crash, and the stick may restart. The cache is a set of temporary files that apps save to load faster. It can grow very large over time.
To check your space, go to Settings > My Fire TV > About > Storage.
To clear an app's cache:
- Go to Settings > Applications > Manage Installed Applications.
- Pick an app you use a lot.
- Select Clear cache.
- Do the same for other big apps.
Uninstall apps you no longer use. This gives the system more room to breathe.
Step 4: Update Fire OS
Updates fix bugs that can cause crashes. An old system may also clash with newer versions of your apps.
- Go to Settings > My Fire TV > About.
- Select Check for Updates.
- If an update is ready, select Install Update.
- Keep the stick plugged in until it finishes and restarts on its own.
Tech news sites like CNET often cover streaming device updates and general tips if you want to learn more.
Step 5: Remove Problem Apps
Sometimes the stick doesn't really restart. An app crashes and sends you back to the home screen, which looks like a restart. If it only happens in one app, that app is likely the cause.
- Clear the app's cache first, then its data if needed.
- Update the app if a new version is out.
- Uninstall and reinstall it if it still crashes.
- Remove any app you installed right before the problem started.
Step 6: Turn Off HDMI-CEC
HDMI-CEC lets your TV and Fire Stick control each other. For example, the TV turns on when you press the stick's remote. But sometimes the two devices send mixed signals, and the screen goes black or the stick seems to reboot.
Go to Settings > Display & Sounds > HDMI CEC Device Control and turn it off. Then watch for a day to see if the problem stops. You can also try a different HDMI port on your TV.
Step 7: Factory Reset as a Last Step
A factory reset wipes the stick and puts it back the way it was when new. You will lose your apps, settings and logins. Only do this after the other steps fail.
Reset From the Menu
- Go to Settings > My Fire TV.
- Select Reset to Factory Defaults.
- Confirm and wait. It can take several minutes.
Reset With the Remote
If the stick restarts too fast to reach the menu, hold the Back button and the Right side of the navigation ring together for about 10 seconds. A reset screen will appear. Choose to continue.
For a simple restart without losing data, hold Select and Play/Pause together for about 5 seconds.
When the Restart Happens Only While Streaming
If the stick works fine on the menus but crashes during live streams, the problem may be the stream, not the stick. A weak connection or a server that keeps dropping can freeze the player until it closes.
Try these steps:
- Change your DNS to Cloudflare (1.1.1.1). DNS is like a phone book that turns website names into addresses. On a Fire Stick, you set it by forgetting your Wi-Fi network, then joining again and choosing the advanced options.
- Raise the buffer to 5,000 ms. A buffer stores a few seconds of video ahead of time, so short drops don't stop playback. Look for it in your player's playback settings.
- Use a stable player app. TiviMate 5.x, IBO Player Pro, IPTV Smarters Pro, Kodi 21 and Flex IPTV all run on Fire TV devices.
The service you stream from matters too. SubTV IP is a premium subscription built for steady playback. It lists 99.9% uptime, an anti-freeze server cluster, and 4K streams at 60 fps using HEVC, a format that keeps sharp video at smaller file sizes.
It works on the Fire TV Stick 4K Max, Samsung Smart TV (Tizen), LG webOS, Android TV Box, Xiaomi Mi Box S and Apple TV. Plans run for 1, 3 or 12 months, with instant activation after you order. You can pay by PayPal or credit card, and help is available through WhatsApp support.
What to Do Next
Work through the steps in order. Start with power and heat, since they are the quickest to fix. Then clear storage, update Fire OS, and check your apps.
Write down when the restarts happen. Is it at startup, after an hour, or in one app? That pattern points you to the right fix. If nothing helps, even after a factory reset, the hardware itself may be failing, and you should contact Amazon support about a repair or replacement.