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

Fix the blinking white light issue in only a few steps!

Reviewed By: Kevin Pocock

Last Updated on March 22, 2024
Xfinity modem blinking white
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If your Xfinity modem or router is blinking white and you can’t figure out how to stop it, we’ve got you covered right here.

If there’s a blinking white light on your Xfinity modem or router, it means there’s an issue with the connection. In most cases, the white light appears when the device is unable to establish or maintain a stable internet connection.

There are quite a few reasons why your Xfinity gateway is blinking white, such as local outages, temporary glitches, or some issues with the hardware. Usually, a blinking white light issue is not a big deal, but you can resolve this yourself with a few steps. However, if the issue persists, you will have to get in touch with the professionals.

To help you out, we’ll discuss why your Xfinity modem or router is blinking white and what you can do to fix the issue so you can get back online.

Quick Answer

If your Xfinity is modem or router is blinking white, it indicates that the device is unable to connect or maintain a stable internet connection. To fix it quickly, you can restart the router, check the cables for damage, check for local outages, or update the firmware.

For more details, check our guide below.

Why is my Xfinity modem or router blinking white?

Here are a few reasons why there’s a blinking white light on your Xfinity modem.

  • Local outage
  • Outdated firmware
  • Temporary bug or glitch
  • Damaged cables
  • Overheating or overloading
  • Hardware malfunction

How to fix the Xfinity modem or router blinking white issue

Here are the methods you need to follow to fix the Xfinity modem white light issue.



Check for power interruption

If your Xfinity modem blinks white, it could be due to a power interruption. Power outages or fluctuations in the electricity supply can disrupt the normal functioning of your modem.

To resolve this issue, check if the power cable connects correctly and ensures no power disruptions in your area.

This is the port where the power cable is inserted.

Xfinity modem power cable port



Check for local outage

It’s worth checking if your area has had a major service outage or maintenance work. You can do this by logging into your Xfinity account or by using the Xfinity app with your Xfinity ID and password and seeing if there has been any notice of a service outage in your area. If this is the case, then your internet service provider will fix the issue as soon as possible. Other than waiting, there’s nothing you can do.



Update the firmware

A blinking white light on your Xfinity modem may indicate that a firmware update is in progress. This update enhances the modem’s performance and fixes any known issues.

During this process, it’s crucial to let the update complete without interruption. Avoid disconnecting the modem or turning it off until the blinking stops, indicating the update is finished.

It can take some time for the update process to finish, so make sure to stay patient throughout the process.



Wait for the initialization process to finish

When you first set up your Xfinity modem or if the device has been reset, it will go through an initialization process. During this time, the modem may blink white, indicating that it has configured its settings and established a connection.

Allow the initialization process to complete, which may take a few minutes. Once finished, the blinking should stop, and the modem will be ready for use.



Check the cables

A white flashing light on your Xfinity modem can indicate a network connection issue. It could be caused by a loose or disconnected cable, a faulty Ethernet port, or a problem with the coaxial cable or ethernet cable that connects your modem to the Xfinity network.

Make sure the cables going into the following ports are inserted correctly.

Internet modem with labeled ports against a blue background, blinking white.

Check all cable connections and ensure you have securely plugged them in. If the issue persists, consider replacing the cables or contacting your internet service provider for assistance.



Check for signal problems

Another reason for a white blinking light on your Xfinity modem is a signal problem. This can occur if the modem cannot establish a stable connection with the Xfinity network.

Check the signal levels by logging into the modem’s web interface or contacting Xfinity customer support for guidance. They can help you troubleshoot the problem and guide you through the process of adjusting the network settings to improve the signal quality.



Hardware malfunction

A blinking white light could sometimes indicate a hardware malfunction within the Xfinity modem. This could be due to a faulty component or internal damage. Sometimes, these issues can be solved with a factory reset by pressing the reset button on the back of the router.

If the reset option and none of the previous solutions resolve the issue, try to contact customer care.



Contact Xfinity customer support

If nothing seems to be working and you have exhausted your troubleshooting options, then we suggest you get in touch with the professionals. You can refer to their online guides, chat with them, and even send them texts. If they’re unable to resolve the issue on call, they will most likely send over a technician who will take a closer look at the device. 

How long does the initialization process of the Xfinity modem take?

The initialization process of the Xfinity modem typically takes a few minutes. During this time, the modem configures its settings and establishes a connection with the network. It’s essential to allow the initialization process to complete without interruption. Once finished, the blinking white light should stop, indicating that the modem is ready. If the blinking persists beyond a few minutes, it is advisable to contact Xfinity customer support for further guidance.

How is the white light on my Xfinity router supposed to be?

Ideally, the white light on your Xfinity router should be steady, which indicates that the router is functioning correctly and there are no issues with your connection.


When your Xfinity modem or Xfinity router blinks white, it’s important not to panic. However, by understanding the potential reasons behind this issue, you can take appropriate steps to troubleshoot and resolve the problem. 

Start by checking for power interruptions, allowing firmware updates and initialization processes to complete, verifying network connections, and checking plugs. It also never hurts to restart the device. Then, if the issue persists, consider checking the signal quality or contacting Xfinity customer support for further assistance. 

In case you are planning to get a new router, check out our top picks for the best routers for Xfinity.

Peter's keen interest in technology has led him to focus AI and networking for PC Guide, with a view on how to get the best out of both.