Roku and Fire TV Stick Wi-Fi Troubleshooting
Roku and Fire TV Stick problems usually look the same: buffering, “not connected” messages, or a stick that can’t find the network after a router change. A streaming stick also sits behind the TV, which is a tough spot for Wi-Fi. This guide follows Roku’s and Amazon’s own support articles, side by side, in the order they suggest.
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Quick answers
- First step on both: restart the stick and then the modem and router (Roku: Why won’t my Roku device connect to Wi-Fi?, Amazon: Can’t connect your Fire TV device to Wi-Fi).
- Roku signal check: Settings > Network > About shows signal strength; Check connection runs a test (Roku: Improve the Wi-Fi connection to your Roku device).
- Fire TV signal check: Settings > Network, then press Play/Pause for the network status tool, or choose Network Diagnostics from the error message (Amazon: Can’t connect your Fire TV device to Wi-Fi).
- Stick behind the TV? Roku says TVs can block Wi-Fi and suggests its free HDMI extender to move the stick out from behind the set (Roku: Improve the Wi-Fi connection to your Roku device).
- Still dropping? Wired Ethernet is more stable than Wi-Fi, says Roku; Fire TV sticks need an Ethernet adapter (Roku: Check the connection on your Roku device).
Restart in the right order
Both companies start with a full restart:
- The stick. Roku: Settings > System > Power > System restart, or unplug it for 10 seconds (Roku: Why won’t my Roku device connect to Wi-Fi?). Fire TV: unplug it, wait 10 seconds, plug it back in (Amazon: Can’t connect your Fire TV device to Wi-Fi).
- The modem and router. Roku suggests unplugging the Roku, router and modem for about 15 seconds, then plugging in the modem first, then the router, then the Roku (Roku: Improve the Wi-Fi connection to your Roku device). Amazon suggests unplugging the modem and router for a minute, then plugging in the modem, waiting about a minute, then the router (Amazon: Can’t connect your Fire TV device to Wi-Fi).
- Test another device on the same Wi-Fi. If a phone or laptop can’t get online either, contact your internet provider (Roku: Why won’t my Roku device connect to Wi-Fi?).
Reset the Wi-Fi connection
Roku: go to Settings > System > Advanced system settings > Network connection reset > Reset connection. The Roku restarts and you set up Wi-Fi again under Settings > Network > Set up connection (Roku: System restart and network reset, Roku: Connect your Roku device to the internet). If your network is missing from the list, choose Scan again; the password is case-sensitive.
Fire TV: go to Settings > Network > Wi-Fi and turn it off and back on. If that doesn’t help, highlight your network, press the Menu button and choose to forget it, then reconnect with your password (Amazon: Can’t connect your Fire TV device to Wi-Fi).
Roku error codes
Roku’s table of connection codes (Roku: Why won’t my Roku device connect to Wi-Fi?):
| Problem | Codes | What Roku suggests |
|---|---|---|
| Wrong password | 14.40, 14.41, 14, 014 | Re-enter the Wi-Fi password. |
| Weak Wi-Fi signal | 14.20, 14.62, 14.64, 016, 017 | Move the Roku closer to the router; restart the router and Roku. |
| Ethernet cable | 012, 013 | Unplug and replug the cable, try another cable, or use Wi-Fi. |
| Slow internet | 018 | Move the Roku closer to the router; restart the modem and router. |
| Can’t reach the internet | 009, 14, 14.10, 14.11, 14.30, 14.50 | Restart everything and reconnect. |
| Can’t update | 003 | Move closer to the router, restart, and contact your provider if it continues. |
If Check connection shows a red X next to the wireless step, the Roku can’t reach your router; if it reaches the router but not the internet, test a website on another device and check for an outage (Roku: Check the connection on your Roku device).
Fix a weak signal
Roku’s placement advice (Roku: Improve the Wi-Fi connection to your Roku device), which applies just as well to a Fire TV Stick:
- Move the stick and router closer together, with fewer walls, cabinets or large furniture between them.
- Don’t put either one inside an enclosed cabinet.
- Raise both higher if you can, and re-aim router antennas.
- Get the stick out from behind the TV with an HDMI extender.
- If your router has separate 2.4 GHz and 5 GHz networks, try the other one (Roku: Check the connection on your Roku device).
- If a Roku shows a low-power message or restarts at random, plug it into a wall outlet instead of the TV’s USB port (Roku: Improve the Wi-Fi connection to your Roku device).
Amazon suggests using one network name for the 2.4, 5 and 6 GHz bands so a Fire TV can pick the best band, and a mesh system for larger homes (Amazon: Can’t connect your Fire TV device to Wi-Fi).
Use a wired connection
Roku says a wired Ethernet connection is more stable than Wi-Fi if your player or TV has an Ethernet port (Roku: Check the connection on your Roku device). Roku streaming sticks don’t have one. Fire TV sticks can go wired with Amazon’s Ethernet adapter, which plugs in between the stick and its power adapter; the micro-USB version doesn’t fit the USB-C Fire TV Stick HD (2nd Gen), which has its own USB-C adapter.
Factory reset, last
Both companies put a factory reset at the end of the list, because it erases your account sign-ins and apps (Roku: Check the connection on your Roku device, Amazon: Reset your Fire TV device to factory settings).
- Fire TV: hold the Back button and the right side of the navigation ring together for 10 seconds, or go to Settings > My Fire TV > Reset to Factory Defaults (Amazon: Reset your Fire TV device to factory settings).
- Roku: Roku says to reset to factory defaults only after trying everything else (Roku: Check the connection on your Roku device).
Products mentioned in this guide
Roku and Amazon both point to a stronger signal or a wired connection when a stick keeps buffering. Details come from Roku and Amazon support and the Amazon listings. When we checked on October 23, 2026, both were in stock as new items sold and shipped by Amazon.com.
Amazon Ethernet Adapter (micro-USB, for Fire TV)
Gives a Fire TV Stick a wired 10/100 connection. Amazon lists it for Fire TV Stick Lite, Fire TV Stick (2nd Gen and later), 4K, 4K Max and Fire TV Cube. It doesn’t fit the USB-C Fire TV Stick HD (2nd Gen), and it won’t work with Roku sticks.
View the Amazon Ethernet Adapter for Fire TV on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and platform support can change; confirm the details on the product listing and the manufacturer's site.
TP-Link Deco X55 (AX3000 Wi-Fi 6 mesh, 3-pack)
For larger homes where the TV is far from the router, the mesh option Amazon mentions. One network name across bands, and three gigabit ports per unit for a wired Roku TV or player near a node. It replaces your router rather than extending it.
View the TP-Link Deco X55 3-pack on Amazon (affiliate link) →
We have not independently tested this product. Availability, specifications and platform support can change; confirm the details on the product listing and the manufacturer's site.
Frequently asked questions
Why does my Roku keep saying it can’t connect to Wi-Fi?
Roku points to a wrong password, a weak signal or a router problem. Restart the Roku, modem and router, check Settings > Network > About for signal strength, and reset the network connection if it keeps failing.
How do I reset the network on a Roku?
Go to Settings > System > Advanced system settings > Network connection reset > Reset connection, then set up Wi-Fi again under Settings > Network.
What does Roku error 014 or 14.40 mean?
Roku lists 014, 14.40 and 14.41 as wrong-password errors. Re-enter your Wi-Fi password carefully; it’s case-sensitive.
Why is my Fire TV Stick buffering?
Usually a weak or busy Wi-Fi link. Amazon suggests Network Diagnostics, restarting the Fire TV and router, moving them closer, and a mesh system for larger homes.
How do I forget a Wi-Fi network on Fire TV?
Go to Settings > Network, highlight your network, press the Menu button, choose to forget it, then reconnect with the password.
Can I use Ethernet with a Fire TV Stick or Roku stick?
Fire TV sticks can use Amazon’s Ethernet adapter (micro-USB or USB-C version to match your stick). Roku streaming sticks have no Ethernet option; some Roku players and Roku TVs have an Ethernet port.
Does putting the stick behind the TV hurt Wi-Fi?
Roku says TVs can block Wi-Fi signals and suggests its free HDMI extender to move the stick away from the back of the TV.
How do I factory reset a Fire TV Stick?
Hold Back and the right side of the navigation ring for 10 seconds, or use Settings > My Fire TV > Reset to Factory Defaults. It removes your account and apps, so try the other steps first.