Home > Router > How To

Xfinity router or modem blinking blue – meaning, causes, and how to fix

Here are some quick fixes for the blinking blue light!
Last Updated on May 2, 2024
xfinity router blinking blue
You can trust PC Guide: Our team of experts use a combination of independent consumer research, in-depth testing where appropriate - which will be flagged as such, and market analysis when recommending products, software and services. Find out how we test here.

Is your Xfinity router or modem blinking blue light, and you can’t make it stop? Don’t worry, as we have some fixes for you.

A blinking blue light on Xfinity router or modem usually means the device is in WPS mode and is trying to establish a wireless connection. However, if the light does not stop blinking after a few minutes, it means there’s something wrong, and you need to troubleshoot the issue.

And this is where we come in. Here, we will go over different reasons why your Xfinity router or modem is blinking blue and what steps you can take to fix it.

Quick Answer

If your Xfinity modem or router is flashing a blue light, it tells you that the WPS mode is active and is scanning for a wireless connection. To stop the blinking, you can try performing a power cycle, improving ventilation, removing physical obstructions. Also, check for local outages with Xfinity’s map.

Why is there a blinking blue light on your Xfinity router or modem?

You might get the blinking blue light on your Xfinity router or modem if you accidentally press the WPS button. In this case, the light should disappear on its own after a couple of minutes. However, there are a few other reasons why the light could be blinking.

  • Internet outage
  • An issue with the cables or splitter
  • Poor signals or physical obstruction
  • Firmware problems
  • Overheating
  • Broken router or modem

How to fix the Xfinity router or modem blinking blue light issue

Here are a few methods you can use to quickly get rid of the blinking blue light issue on your Xfinity modem or router.



Check for local outages or maintenance from the ISP

Your first step should be to check the Xfinity Status Map for any known local outages in your area. If any maintenance or outage is going on, it is the root cause of the blinking blue light on your Xfinity router or modem, and your only option here is to wait for Xfinity to fix the issue. You can also get status updates regarding network outages in your area through the xFi app. 

Screenshot of a Xfinity outage map on their website, featuring a search bar to enter addresses to locate local service interruptions and showing areas where Xfinity router or modem may be blinking blue.



Examine cables and splitter

You can also get the blinking blue light on your Xfinity router or modem if there is a loose or broken cable. Thoroughly go over every cable and look for any signs of damage or cuts. You should also hold the cable and run your fingers through its length to feel for any irregularities. 

If you’re using a splitter to divide your connection, there is a big chance it has stopped working and is causing the problem. Remove it and check whether the blinking blue light disappears or not.



Remove physical obstructions

Since the blinking blue light indicates your Xfinity router or modem is trying to establish a WPS connection, any major physical obstructions between the devices can also cause the issue. You can bring the devices closer to each other and check if the issue resolves itself. 



Do a power cycle

Your Xfinity router or modem may be stuck with a blinking blue light due to a software glitch. In this case, any temporary bug or glitch can be cleared with a power cycle. 

Simply power off your Xfinity modem or router, remove its cables, wait for 5 minutes, and power it on again. Let the reboot process finish, and the blinking blue light should hopefully disappear after the device turns on.



Check for overheating

If you have placed your Xfinity router or modem in a confined space with poor ventilation, it can overheat and throw up the blinking blue light. 

Try relocating the router to a more open space with better air circulation. Furthermore, clean the router to remove dust build-up, as it can trap heat and cause thermal throttling.



Perform a factory reset

If there is a firmware bug or glitch that did not resolve with a power cycle, you should do a factory reset. This will take your Xfinity router or modem to its original factory settings, meaning you’ll have to set up your WiFi name, password, and settings from scratch like you did when you first got it.

  • Find the reset button (a small hole) at the back of your Xfinity router or modem.
  • Insert a pin (like a toothpick or paperclip) inside the hole and wait for around 30 seconds.
  • Pull out the pin when all the lights on your router or modem shut off.

Once the factory reset process is over, you can start setting up your Xfinity router or modem.

reset router xfinity with wps button



Update the firmware

If the firmware on your Xfinity router or modem is outdated or broken, it can cause it to throw all sorts of errors, including the blinking blue light one. Furthermore, having the latest firmware gives you access to the latest features and optimal performance. Here’s how you can update the firmware:

  • Go to the Xfinity website and sign in with your registered account.
  • Navigate to the Update Firmware tab.
  • Download the latest firmware and install it.

Once the latest firmware has been successfully installed, the blinking blue light should go away.

During the installation, your Xfinity router or modem may blink with a yellow or orange light. Don’t worry about it, as it indicates that the firmware is updating.



Check for overloading

If you’ve tried every fix in this list and the blinking blue light on your Xfinity modem or router persists, then your router might be overloaded with too many connections. 

Too many connections on your modem or router can lead to network congestion, resulting in a blinking blue light. However, this is easy to fix as you simply have to disconnect the devices individually and check if the modem or router starts working normally and if the blinking blue light goes away. 

If it does, then it is time to upgrade your modem or router to a model that supports the number of devices you want to connect. 



Do a wired connection check

The blinking blue light on your Xfinity modem or router might be due to an ISP or WiFi issue. Doing a wired connection test is recommended to find out who is responsible. Here is how to do it: 

  • Connect the Xfinity modem or router with your PC, a Mac, or a Windows device using an Ethernet cable. 
  • Turn on your device; it should detect and connect to the network automatically. 
  • If it doesn’t detect it automatically, open the network settings on your preferred device.
  • For a Windows device, open the control panel or use the Windows + i shortcut to open the settings. Go to Network and Sharing Center and change the adapter setting to configure the network settings. 

Screenshot of the "advanced network settings" menu on a computer, highlighting options for ethernet and wi-fi connections, with a red arrow pointing to the "edit" button for the Xfinity modem blinking blue

  • For a Mac, the process is relatively straightforward. Just click on System Preferences and then select the Network option. 
  • Look for the wired connection network interface and check if it’s enabled. 
  • Head to your browser and test the internet connection by browsing any website. If it doesn’t work, the issue is caused by the Ethernet cable, and replacing it might fix it.



Contact Xfinity support

Doing a factory reset and updating the firmware is your last resort to fix any software-related issues. If you’re still getting the blinking blue light on your Xfinity router or modem, the problem is probably the hardware.  This means you’ll have to contact Xfinity customer support for assistance. Their team will likely ask you to ship them the device and will send you a fresh unit if it cannot be repaired.

How do I get my Xfinity gateway back online?

The quickest way to get it online is by restarting or power cycling it. However, your device may fail to go online if it’s running on outdated firmware or if there’s something wrong with the hardware.

What to do when the xFi gateway blinks a blue light?

As mentioned in our guide above, if your Xfinity router is flashing a blue light, it means that it is looking to connect to a wireless device. If you don’t want to use the WPS mode, you can turn it off, and the blinking should stop. You can also try restarting the router. If the flashing blue light still doesn’t go away, you can get in touch with Xfinity support for further assistance.


If your Xfinity router or modem is blinking blue, don’t panic. Instead, troubleshoot the issue through the basic methods first, like performing a power cycle and updating the firmware. If that doesn’t work, reset your device to take it back to its default setting. But if the blinking blue light isn’t going away no matter what you do, get in touch with Xfinity support for further assistance. If you end up buying a new router or modem to go along with your Xfinity plan, check out our top picks for the best routers for Xfinity and the best modems for Xfinity

Abdul is a tech writer and Editor for PC Guide, specializing in all things tech, gaming, and hardware.