Comcast Xfinity Modem/Router Blinking White – 8 Easy Fixes

You can stop your Xfinity router from blinking white by waiting for Comcast to restore service, restarting/resetting it, updating the firmware, or checking the cables and connection. If none of those work, you will need to contact Comcast support for assistance.
Comcast Xfinity Modem Router Blinking White

I’m Jon, a home networking guru, and I’ve experienced all types of blinking light problems with my own Xfinity router. So, I made this guide to help you.

Keep reading to learn how you can fix the blinking white light on your Comcast Xfinity modem/router.

What Does a Blinking White Light on an Xfinity Router Mean?

A blinking white light on an Xfinity router means its connection keeps getting interrupted. Various things can cause an unstable connection, such as a bad Wi-Fi signal, a large power outage, or a loose Ethernet cable. 

It can also signify that the router is not activated. 

Some newer Xfinity routers have a bit of purple color in the white LED. So, if your white blinking light has a purple tint, you’re in the right place.

But, keep in mind that different color lights on your router mean different things

How to Fix the Blinking White Light on Your Xfinity Router

If you’re troubleshooting your Xfinity router and see a blinking white light, here are some potential fixes:

#1 Look for a Service Outage

Before you start fiddling with your router, it’s always a good idea to check for any service outages in your area. To do this, log into your Xfinity account and go to the Service Status Center.

If there’s an outage, all you can do is wait until service is restored. In the meantime, you won’t have Internet access from your Comcast. But perhaps you could use a mobile hotspot from your smartphone if you really need to be online.

#2 Activate the Router

If you are a new Comcast Xfinity customer, you may have a white blinking light because your router isn’t activated. 

In that case, you need to provide them with the MAC-ID and the device will be live. To activate it by phone, call 855-652-3446 or do it online by following this link

#3 Check Your Cables

If there’s no service outage and your modem is activated, the next thing to check is your Ethernet cable. If it’s not plugged in correctly or is loose, that could be why your Xfinity router’s light keeps blinking white.

Also, check the coaxial cable connections to the back of your router/modem combo (or modem). 

If you have separate devices, unplug and replug the Ethernet cable from your modem to your router to fix this. You might also want to try a different Ethernet cable to rule out a bad cable as the problem.

#4 Restart the Modem/Router

If your Xfinity router’s light is still blinking white, try restarting the modem/router. Unplug the power cord from the back of the router and wait a few seconds. Then plug it back in and wait for the router to power on again.

Once the device has restarted, check to see if the light is still blinking white.

#5 Update the Router’s Firmware

If you’ve tried all of the above and your Xfinity router’s light is still blinking white, there might be a problem with the router’s firmware. Firmware is the software that runs on your router and helps it connect to the internet.

To update your router’s firmware, log into your Xfinity router. From there, find your router in the list of devices and look for settings.

In the router’s settings, click on Update Router Firmware. If there’s a new version of the firmware available, Comcast will automatically install it for you.

#6 Check the Device Logs

Another way to see what the issues might be is to check the device logs. These sometimes show you what problems the device is having and where they stem from. 

To check them, log into your device and to the “log tab”. Just know that if you rent a gateway from Xfinity they might block you from seeing them. 

#7 Reset the Router

If updating the firmware doesn’t fix the problem, you can try resetting the router to its factory settings. This will erase all your custom settings, so be sure to back up any settings you want to keep before resetting the router.

To reset your Xfinity router, you can log into your router’s admin page. Find your router in the list of devices and click the gear icon next to it.

In the router’s settings, click on Reset Router. Comcast will now reset your router to its factory settings.

You can also reset your router by pressing and holding the reset button on the back of the router for 10 seconds.

Once the router has been reset, you can set it up again from scratch. Be sure to choose a strong password for your Wi-Fi network to keep your connection secure.

#8 Contact Xfinity Customer Service

If you’ve tried all of the above and your Xfinity router still has problems, it’s time to call Comcast for help. They might need to send a technician to your house to look at the problem.

You can reach Comcast customer service online or by calling 1-800-XFINITY.


If your Comcast Xfinity router blinks white (maybe light purple), it has an unstable connection. To fix it, you can use the tips above.

But, if none work, you should contact Comcast customer service for help. If they can’t fix it remoting, they will send a technician to fix it.

Which of the above tips fixed your blinking white Xfinity router?

If you’re tired of constantly troubleshooting your Comcast-provided router, you can get a better one – check out our guide here for some recommendations.

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