Centurylink Router Blinking Red & Green

Seeing your CenturyLink router blinking red and green can be pretty frustrating. Knowing what the lights on your CenturyLink router mean can really help you troubleshoot your home network. This is the reason why we are going to see why is your CenturyLink router blinking red and green in the first place and after that what to do to fix the issue.

As a CenturyLink user you are probably using either a tower modem or the C4000 one. So, let’s see what it is trying to tell us by blinking red and green.

Why is the Centurylink Router Blinking Red and Green?

Tower modem

If you have noticed the Internet light on your Tower modem to blink red and green it usually indicates that it is detecting the internet configuration automatically.


If you are connected using a DSL connection you can notice the DSL light at the back of the router to blink red and green. It is a sign that the connection is being established and that the modem is syncing with the network. Once it gets synchronized the DSL light should turn green. However, if it remains red it is a sign that the ISP network hasn’t been detected.

Centurylink Router Blinking Red and Green

How do I fix my CenturyLink flashing red and green light?

As you can see there are different things the CenturyLink router is saying but luckily there is something we can do about it.

Just wait a little

If you are seeing the red and green light on your Tower modem blinking one after the other, the first thing to do is to wait a little. Maybe even while reading this article so far the red and green lights have stopped blinking.

The automatic internet configuration detection shouldn’t last for more than 60 seconds so just wait a little.

Network not activated

Maybe you have just become their customer or you have changed your plan. In that case there are high chances that your network hasn’t been activated yet. In this case you can either contact support and check with them whether that is the issue or wait till tomorrow to see what happens. If that was the reason the green and red light will stop blinking once your network gets activated.

Check connections

Check whether the green cable is connected to the wall jack and the green DSL port. If it isn’t connected or the connection is loose, disconnect it and connect it again to make sure everything is firmly connected.

Is the jack faulty?

Sometimes a faulty jack will make your CenturyLink router blink red and green. If you have another jack to connect the modem to please do that and see whether the problem remains.

Reboot the router

We are sure you have noticed so far that whenever one of your devices gets buggy, rebooting the device usually resolves the problem. Well, the same happens with your router.

Many users have confirmed that the red and green blinking light issue was fixed after rebooting the router. The steps required to do this properly are pretty simple and straightforward.

  • Disconnect the router from the power source.
  • Wait for at least 60 seconds.
  • Plug in the CenturyLink router back again.
  • Wait for the router to boot up completely.

The green and red light blinking should be gone by now.

Contact CenturyLink Support

You have tried everything we have recommended and the red and green light is still blinking on your router? Well, in that case we recommend getting in touch with CenturyLink Support. They have the ability to diagnose the problem and fix it easily, so if nothing else works this is a sure option to have your Internet connection up and running in no time.

Final Words

We hope that this article has helped you fix the CenturyLink Router Blinking Red and Green issue on your own. As you can see from the solutions given above, you don’t need any previous experience in order to fix it on your own. Luckily, the same applies to resolving numerous other networking issues you may have in the future. Therefore, before asking the customer support for help, try to fix it on your own first.

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