Cox router or modem blinking green – causes, meaning and how to fix

Try these methods to make the green light stop blinking!

Cox blinking green

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Are you facing the Cox router or modem blinking green issue and can’t seem to figure out how to fix it? We’ve got your back.

Now, a Cox router does show a green light initially, which just means that the router is establishing an upstream channel. When that’s done, the green light goes away – and this all happens in a few seconds. 

But when the green light keeps blinking for a few minutes, it becomes a problem. Usually, it means that there are issues with the network. This could very well be due to a local power outage, in which case you’ll simply have to wait it out. However, if that’s not the case, you’ll have to start troubleshooting it yourself.

And this is where we come in. In this guide, we will tell you about the potential causes behind the Cox blinking green issue and what steps you can take to fix it as soon as possible.

Quick Answer

If your Cox router has been flashing green light for a few minutes, it indicates that there are issues with the network. You can try solving this by rebooting your router or resetting it. Also, check for local outages, coax cable, or any physical damage to the hardware.

Why is there a blinking green light on your Cox router or modem?

Here are the several reasons you might be getting the blinking green light issue on your Cox router or modem.

  • Local Cox outage or scheduled maintenance.
  • Broken coaxial cable or damaged splitter.
  • Overheating.
  • Software glitches.
  • Outdated firmware.

How to fix the Cox router or modem blinking green light issue

In this section, we will walk you through different ways to fix the blinking green light issue on your Cox router or modem.



Check for internet outage

Since the blinking green light on Cox modems means an unstable internet connection, there is a big chance of a local outage or scheduled maintenance from Cox’s end. So, contact your ISP and Cox for any known outages. If that’s the case, there isn’t much you can do except wait for the issue to resolve. You can also check Cox’s outage portal for updates.



Inspect your coaxial cable and splitters

If everything is good to go from the backend, you should physically inspect your modem/router, the coaxial cable, connectors, splitters, and power outlet for any defects. Make sure all the cables are inserted correctly and firmly into the devices, and examine the entire coaxial cable to look for any damage or cuts. On top of that, remove the splitter you’re using and check again. If the issue is resolved, it means there’s a problem with the splitter, in which case you’ll have to replace it.



Reboot your Cox router

Another quick solution to the flashing green light might be rebooting your Cox router. Rebooting is quite simple and would take about 2 to 3 minutes. However, do not reboot your router if it is updating its firmware, as it might interfere with that process.

Here’s how to reboot your Cox router – 

  • Unplug your router from the power source
  • Wait for a minute
  • Plug it back in
  • Let the router boot up
  • Check if the flashing green light still persists



Place the Cox device in a well-ventilated area

If you have the Cox modem tucked away in a closed compartment or a place with little to no air ventilation, it might give you the blinking green light issue due to overheating. In this case, relocate the device somewhere with better airflow and clean it with a cloth to remove any dust build-up.



Reset your Cox modem

If none of the above fixes have worked for you so far, it is time to reset your Cox device. Keep in mind that your modem will revert back to its original factory settings after the reset, meaning you’ll have to re-configure your network and set it up again.

  • Look for the reset button at the back of your Cox device and press it using a needle or a sharp pin.
  • Wait for the front lights to disappear or flash (depending on the model).
  • Release the reset button and give the reset process around 10 minutes to finish.

Once the Cox modem boots up again, re-configure its settings and see if the blinking green light issue is gone.

If your Cox modem does not have a dedicated reset button, you can press the WPS button the same way to reset it.



Get assistance from Cox

If nothing works, it might indicate that there’s something wrong with the device’s hardware. In such a situation, it is wise to contact Cox support for assistance. They will most likely send over someone to take a look at your device. If the technician is unable to fix it, you will have to get a new one. 

Why is the green light on my Cox router flashing?

As mentioned in our guide above, there are very few reasons why your Cox router has a blinking green light. While installing, the Cox router does show a green light, which means that it’s registering its upstream channel. However, it quickly turns white after a few seconds. It becomes a problem when the green light keeps flashing green after a few minutes.

What color should the Cox router light be?

Your Cox device should have a solid white light, which indicates that everything is running smoothly and the connection is stable.


The blinking green light on Cox can be annoying, but it can be fixed quickly using some simple methods like power cycling the device or updating its firmware. But if these don’t work, try factory resetting your device to take it back to its default settings. In the end, get in touch with Cox support for further assistance. If your current device needs to be replaced, check out our top picks for the best modem for Cox and the best router for Cox.