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Xfinity Modem Blinking Yellow: Causes and Fixes

Experiencing a yellow blinking light on your Xfinity modem can be frustrating and confusing. When this occurs, it might indicate several potential issues, such as an internet outage, a problem with your cables, or software updates.

The Xfinity modem blinking yellow can indicate the router is connecting to the Xfinity System. If it won’t stop blinking, start by power cycling the unit before checking for an outage with your Internet Service Provider (ISP). Check for loose or damaged cables before considering a factory reset.

In this article, we will guide you in understanding what a yellow blinking light means on your Xfinity modem, and provide easy steps to help you resolve the issue. Although troubleshooting your Xfinity modem may seem overwhelming initially, it’s important to remember that most causes of the yellow blinking light can be easily resolved with our guidance.

5 Troubleshooting Steps For An Xfinity Modem Blinking Yellow Light

The following table provides a concise overview of potential causes and immediate solutions for Xfinity Modem Blinking Yellow. For a more comprehensive, step-by-step troubleshooting guide, detailed information is available further on.

Potential IssueTroubleshooting Steps
Internet connection issuesYour modem might be taking time to establish a connection with your internet service provider, or your ISP may have an outage, so you can check with them.
Faulty cablesEnsure both your Ethernet and coaxial cables are securely connected and in without any damage.
Power cycle your modemUnplug your modem from the power source, wait for a minute, and then reconnect it.
Reset your Xfinity modemPress and hold the Reset button on your modem for 30 seconds to restore the modem to its factory settings.
Test with a different deviceTry connecting a different device to your modem via an Ethernet cable to see if the problem lies in the modem or connected device.
5 Potential Fixes

Troubleshooting Steps (Detailed Explanation)

Checking Internet Connection (Router Attempting To connect)

The first thing you should know is that, like computers and mobile apps, the Xfinity gateway connects to the network automatically, and this process typically takes 10 to 15 minutes, during which time the LED lights on your router may appear orange. If your Xfinity Modem continues to blink yellow after 10 to 15 minutes, proceed with the following listed steps.

And if you just restarted the router or had a power outage, remember: it’s expected that the router would be blinking and trying to restart itself. If it continues, go ahead and give your Internet Service Provider (ISP) a call so that you can find out if there’s an outage on their end in your area, or if it’s your modem that’s acting up.

Inspecting Cables and Connections

Once you have determined that the Xfinity Modem is not blinking yellow due to the router connecting to the Xfinity System, the next recommended step is to inspect your cables and cable connections. Loose or damaged cables can often be the cause of this issue. Take the time to thoroughly examine your hardware and connections for any potential issues. Here are the steps to follow:

  1. Verify that all cables, including coaxial cables and Ethernet cables, are securely connected.
  2. Check for damage or loose connections in all cables.
  3. Try a different Ethernet cable if you’re experiencing issues with wired connections, or consider buying a new one(on Amazon).

Restarting + Performing a System Reset


Software updates may help resolve certain issues with your Xfinity modem. There are two ways to perform a software update on the Xfinity modem – restarting the modem or resetting it. Note that resetting your modem can erase customized settings, so be prepared to reconfigure your model/router afterward if needed. Here are the steps:

  1. Restart: 
    • Unplug your Xfinity modem
    • Wait for wait for 30 seconds.
    • Plug it back in. The modem will reboot and attempt to establish a connection with a blue light indicating a successful connection.
  2. Reset:
    • Locate the reset button on your Xfinity modem.
    • Use a paperclip or a similar thin object to press and hold the button for 30 seconds.
    • The LED lights will flash, indicating the modem is resetting to factory settings.

Contacting Xfinity Support

If you have tried all the troubleshooting steps and your modem is still blinking yellow, it’s time to contact Xfinity Support. They can provide additional assistance, send a technician to your home if needed, and even replace your modem if it’s found to be faulty. They can also guide you through any specific configurations or software updates to improve your modem’s performance and your overall internet access.

Your Xfinity Modem May Not Be The Cause

An Xfinity modem blinking yellow may indicate a potential issue with your internet service provider. One common cause could be an outage or service disruption. You may need to investigate further and check for any reported outages or service disruptions in your area. You can easily do this by downloading the Xfinity App(Android/iOS).

Additional Tips For A Smooth Experience

Encountering the issue of Xfinity modem blinking yellow can be quite frustrating, especially when the cause is unclear. Staying informed about your modem’s signals and status can ensure your internet experience is smooth and uninterrupted. Consider exploring our related posts on topics such as Xfinity router blinking blue, orange, or white.