Xfinity modem comes on for a minute then goes off

Having a stable internet connection is essential in today’s digital age, and a malfunctioning modem can be a major inconvenience. One common issue faced by Xfinity users is a Xfinity modem comes on for a minute then goes off. In this article, we will explore some possible causes and provide troubleshooting steps to help you resolve this problem and restore your internet connection.

Power Supply Issues

One of the primary culprits for a modem turning off shortly after powering on is a power supply problem. Here are a few steps to address this issue:

  • Verify the Power Connection: Ensure that your modem is correctly plugged into a functioning power outlet. Check the power cable for any damage or loose connections. Consider trying a different power outlet to rule out any electrical issues.
  • Power Cycle the Modem: Disconnect the power supply from the modem and wait for about 30 seconds. Reconnect the power cable and allow the modem to restart. This power cycling process can help resolve temporary glitches that may be causing the problem.
  • Consider an Uninterruptible Power Supply (UPS): If power fluctuations or outages are common in your area, it might be worth investing in a UPS. A UPS acts as a backup power source and helps protect your modem from sudden power interruptions.


Modems generate heat during operation, and excessive heat can lead to performance issues. Follow these steps to address potential overheating problems:

  • Ensure Adequate Ventilation: Check that your modem is placed in a well-ventilated area, allowing for proper airflow. Avoid placing the modem in enclosed spaces or near other heat-generating devices.
  • Check for Dust Accumulation: Over time, dust can accumulate on the modem’s vents and obstruct airflow, leading to overheating. Use a can of compressed air or a soft brush to gently clean the vents and remove any dust buildup.
  • Consider a Cooling Solution: If your modem continues to experience overheating issues, consider purchasing a cooling pad or a small fan to improve airflow and dissipate heat.

Firmware and Software Updates

Outdated firmware or software can cause stability issues in your modem. Follow these steps to ensure you have the latest updates:

  • Log in to Your Modem’s Web Interface: Open a web browser and enter the default IP address of your modem (e.g., or to access the modem’s configuration page. Check the user manual or contact Xfinity support for specific instructions.
  • Update Firmware: Once logged in, navigate to the firmware section and check for any available updates. Follow the on-screen instructions to download and install the latest firmware version.
  • Contact Xfinity Support: If you encounter difficulties updating the firmware or suspect a software-related issue, reach out to Xfinity customer support for further assistance.

Read Also: How to fix blinking green light on your Xfinity modem router


Experiencing a situation where your Xfinity modem comes on for a minute then goes off can be frustrating. However, by following the troubleshooting steps outlined in this article, you can address power supply issues, overheating problems, and ensure that your modem’s firmware and software are up to date. Remember, if the problem persists, don’t hesitate to reach out to Xfinity support for expert assistance in resolving the issue and restoring your internet connection.

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