Why does my Firestick keep rebooting?

The most common cause is power: running it from the TV’s USB port or a phone charger instead of the supplied adapter in a wall socket. Heat and HDMI problems are the next most common.

Can the TV’s USB port power a Firestick?

Amazon advises against it. Use the power adapter and cable from the box; Amazon says the included accessories make sure the Fire TV gets enough power.

Will a factory reset fix a restart loop?

Sometimes, if the software is corrupted, but it erases everything. Rule out power, heat and HDMI first.

Firestick Keeps Restarting: Power, Heat and Software Fixes

Firestick keeps restarting? How to stop it

A Fire TV that restarts on its own is most often short of power. Amazon is clear that the stick should use the power adapter that came with it, plugged into the wall. Heat, an HDMI problem or a failed update make up most of the rest. Check them in this order.

Updated 29 September 2026 · 2 min read

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Check these in order

Power: the original adapter, in the wall

Use the cable and adapter from the box, plugged into a wall socket, not the TV’s USB port or a phone charger. If you’ve lost them, Amazon recommends Amazon-branded replacements. Try a different socket and avoid extension leads with lots of other devices on them.

Heat

Move the stick away from the back of the TV with the HDMI extender, and keep it away from heaters and closed cabinets. See Firestick overheating.

HDMI

Plug the stick directly into the TV, not an HDMI hub or switch, and try another HDMI port. Turning HDMI-CEC Device Control off in SettingsDisplay & Sounds can stop other devices waking or switching the TV and stick unexpectedly.

Software

Check for a system update under SettingsMy Fire TVAbout. An update needs at least 500 MB of free space; if storage is nearly full, free some first. See update a Firestick.

One app, or everything?

If restarts only happen in one app, clear that app’s cache and data, or reinstall it. See clear cache and delete apps.

Factory reset, last

If none of that helps, a factory reset rules out corrupted software. It erases your account and apps. See restart and reset a Firestick.

If it still reboots with the original adapter, in a cool spot and plugged straight into the TV, the stick itself may be failing.