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How Do I Fix the Issue With Xfinity Router Blinking Blue? | 14 Solutions

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There are a few issues you could face while trying to fix your Xfinity Router. If your Xfinity router becomes stuck with a blinking blue light or periodically starts blinking the blue light by itself, we have put together some real-time solutions that were provided by legitimate users’ feedback.

Here are the most common cases that you could be facing when your Xfinity Router is blinking blue:

  • Router starts periodically blinking blue but connects properly after reset
  • Router is stuck at blinking blue during setup
  • Router reboots by itself and starts blinking blue

What Does It Mean When Your Xfinity Router is Blinking Blue?

The blue blinking light on the Xfinity router means it’s in WPS mode and trying to connect to other wireless devices. The cycle is usually finished automatically in 15-20 minutes; however, sometimes can be stuck in blinking blue for longer, which is a cause for concern.

That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

Read This Before Jumping to Solutions:

  • Go through each solution individually, allowing at least 15-20 minutes after applying each solution; otherwise, you won’t know what works and does not.
  • When the router is restarted/rebooted, the light should go like this:

Solid Orange > Blinking Orange > Blinking green > Solid White.

The solid white light always means your modem has connected successfully. This cycle takes at least 15 minutes.

  • Based on real users’ feedback, the most common reason for blinking blue light is the poor condition line. If this is the case, you’ll likely have to book an appointment with a technician.

Tip: All solutions apply to Xfinity XB3, XB6, XB7, and XB8 routers.

How to Fix a Blinking Blue Light on Xfinity Router? All Possible Solutions

Some of these solutions can help optimize your router’s connection to all possible faults it faces. It is best to go from our first solution, then the second, and so on, to eliminate all potential factors.

Solution 1 | Check Specs in Configuration Manager

The Configuration Manager for your Xfinity Router provides real-time specs showing your line in good condition. To access Configuration manager, follow the steps below:

  1. Make sure you’re on the correct Wi-Fi
  2. Open a new browser tab on your PC and type or
  3. Type “admin” in the Username field
  4. Type the unique password printed on your device’s bottom label in the Password field.

You will be shown two tables: Downstream and Upstream. You have to make sure that each channel is within these recommended values:

  • Downstream power (Pwr): between -10 and 10 dBmV
  • Downstream SNR: > 33 dB
  • Upstream power (Pwr): between 35 and 51 dBmV
Downstream channels have to be within recommended ranges
Upstream channels have to be within recommended ranges

If any of the channels are NOT within recommended ranges, there is an issue with your line. Contact Comcast and book an appointment with a technician.

Note: Some modems don’t allow access to Configuration Manager.

Solution 2 | Remove or Replace Splitters

Any remaining splitters should be high quality. If not, they should be replaced with newer and more high-quality splitters.

Make sure you have no more than one splitter in the feed inside your house.  If there is a splitter, it may need to be replaced with one that can work with the frequencies necessary for DOCSIS 3.1 to operate.  If it’s an older splitter, it may not be up to par.

A single two-way splitter connected from the street/pole can have one port feeding the modem and the other feeding the rest of the house/equipment. These can have, if needed, other splits. This could be a solution if:

  • There aren’t any unneeded splitters that can be eliminated
  • Your coax wiring setup can’t be reconfigured.
Replace or remove cable splitters, then check the connection

Solution 3 | Inspect Cables for Damages

Check the coax cable for any damage, such as cuts, nicks, kinks, sharp bends, etc. The line should be bi-directional and rated for 5-1000 MHz. We do not recommend using gold-colored cable from Radio Shack, Home Depot, Target, etc.

Also, ensure you’ve checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart. After this, clean off any corrosion or oxidation on the center wire and put them back together.

Solution 4 | Try Other Coax Cables

Sometimes there are multiple coax cables in the house, but only one coax cable is activated, which is the one you must use. Test if the modem can connect via another coax cable.

If that is the issue, you can ask for a tech to reinstall, but it will be a $39.98 charge. So keep this in mind if you can fix this issue yourself.

Solution 5 | Hardwire Your PC to the Router

It might be required to hardwire to your PC if the router blinks randomly or switches between orange, green, and red. Hardwiring your PC can directly connect the PC to the internet. This is a complete way to check if the router is receiving any internet connection.

The modem is good if you have an internet connection after hardwiring your PC.

Hardwire the Xfinity modem to your PC (plug into the yellow port on the modem)

Solution 6 | Reboot Modem: Pull Out Power Cable

Sometimes, a simple response such as disconnecting and reconnecting the power cable works. Wait 15 minutes after reconnecting to test the router again.

Solution 7 | Hard Reset your Xfinity Router

Hold the back reset button for a minute, then do nothing for 15 minutes. This will clear any changes made to the startup file and load the factory config file.

Once the reset is finished, you will need to reconfigure your WiFi admin and password. Hard-resetting your router means nothing that was once saved on the Router will remain. Keep this in mind before choosing the Hard Reset option.

If your gateway doesn’t have a dedicated reset button like on XB7 and XB8 models, you must press and hold the WPS button.

Reset by holding the button for 30 seconds

Solution 8 | Check for Outages

Enter your address and check if there is an outage in your area. If that’s the case, wait till it’s fixed.

There may be an outage in your area

Solution 9 | Make Sure the Router is Activated on the Xfinity xFi App

If the router is stuck blinking blue, it may not be appropriately activated.

Download Xfinity xFi from App Store or Google Play Store and follow the instructions until the modem is fully activated.

Solution 10 | Wait to Connect Ethernet Cables until the Modem is Activated

Always complete the activation before connecting Ethernet cables to avoid any disturbances during the activation. Just have the power cord and the incoming cable outlet. 

When you hook up the Ethernet cords beforehand, it starts directing instructions to the PC the Ethernet cord goes towards.  Make sure to wait even if it feels like an extremely long time.

Easy Fixes to Xfinity Router Blinking blue - do not hook up ethernet cables
Wait till your router is activated, then connect the devices

Solution 11 | Ask Comcast Support to Deactivate the Old Modem; Activate a New One.

If you have another modem and are trying to activate a new one, maybe the old one is still active on the account instead of the new one, so you need to call Xfinity to start the right one.

If another Xfinity Modem was activated before you moved in, this could be causing the issue with your connection problems.

Call customer service, tell them you want to start a new modem and ask them to remove the old one from the system. Support will only activate the new Modem once the old one is removed from the system.

Solution 12 | Take Your Router to the Local Xfinity Store

Sometimes, simply taking your Xfinity Router to the store for a quick replacement is the easiest and best solution if all other solutions fail.

Calling for an appointment can take days or weeks, so make sure to walk into the store to be taken care of quickly. Take your router to the nearest Xfinity store, and they should be able to replace it for free.

Solution 13 | Contact Comcast Customer Support

Do yourself a favor and call Comcast. When you get a hold of someone, tell them you want to be transferred to “Advanced Wireless Gateway Repair” They usually run a health check and some diagnostics and see what’s going on. They should be able to do a ping modem test and speed test. Both of which you can do yourself, but they can see your lines and signals.

Once diagnostics are finished, they will likely send you a technician or a new router. Note that appointments can be days or weeks away. This reason is why Solution 12 could be a better option.

Bear in mind that if the premises-facing techs can not find or fix a problem at your home, they are responsible for escalating it to their line/network/maintenance dept. Techs.

The problem may lie beyond your home in the local neighborhood infrastructure, but it is their S.O.P. to start at home. They will not charge you for their help if the problem is on Xfinity’s.

Solution 14 | Briefly Disable Security Software to Test the Connection.

If you have security software installed on your computer and have connection problems, disable it briefly and check connectivity. Sometimes programs can block connections that are falsely flagged as unsafe.

Typically security software will require permission before allowing a new relationship.  Some operating systems may also automatically prevent connections without express consent from the user, depending on the security settings.

Note: VPN programs can block your internet connection.

If you have an internet connection on one device but do not on another, search for problems within that device.


What Does It Mean When Your Xfinity Router is Blinking Blue?

It means that the router is in WPS mode and trying to connect to other wireless devices. The cycle is usually finished automatically in 15-20 minutes.

Sometimes the router can be stuck in blinking blue for various reasons.

How to fix Blinking Blue issue on Xfinity router?

We developed 14 actionable solutions to solve connectivity issue on Xfinity router. You can try anything from Check Specs in Configuration Manager to hard resetting your router. All solutions are explained in our article.

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Pigtou Editorial Team

A group of tech enthusiasts who find pleasure in troubleshooting and resolving various issues. When we're not engaged in writing, we typically enjoy playing table football or spending time with our office dog.
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