Common reasons Cox internet stops working
Cox internet goes down for a few predictable reasons, and most of them you can fix yourself in under ten minutes. The most common cause is a loose cable — the coaxial cable that runs from the wall outlet into your modem looks like a thick TV cable and unscrews by hand. If it has come loose even slightly, your connection drops. The second most common reason is that your modem or router has crashed and needs to be restarted. The third is that Cox is experiencing an outage in your area, which you cannot fix but can confirm in seconds.
Less often, your internet goes down because your bill is overdue and Cox has suspended service, or because too many devices are connected and your router is overwhelmed. Occasionally the problem is not Cox at all — it is your computer's network settings, or your Wi-Fi password has changed without you knowing it.
Key Takeaways
- Check the cables first: the coaxial cable from the wall and the power cable to your modem should both be hand-tight, and the lights on the modem should show a steady connection.
- Restart your modem by unplugging it for 30 seconds, then plugging it back in and waiting three minutes for it to fully boot.
- Check Cox's outage map at cox.com/residential/support/internet/outages or call 1-800-234-3993 to confirm whether the problem is on their end.
- If you have restarted the modem and there is no outage, the problem is usually your router, your device settings, or an overdue bill.
- A factory reset of your modem erases your settings but solves most connection problems — hold the reset button for 10 seconds, then reconfigure with your Cox account information.
Check your cables and modem lights first
Before you call Cox, spend two minutes checking the physical connections. Look at the back of your modem. You should see a thick coaxial cable (it looks like a TV cable) screwed into the port labeled "Cable In" or "Coax In". Unscrew it by hand — it should take a quarter turn — and screw it back in firmly. Do the same with the power cable. Loose connections account for roughly half of all "my internet is down" calls.
While you are there, look at the lights on the front of the modem. You should see a steady light (not blinking) labeled "Online", "Internet", or "Connected". If that light is off or red, your modem is not connected to Cox's network. If it is blinking, the modem is trying to connect but has not succeeded yet. Write down what you see — you will need this information if you call Cox.
Restart your modem the right way
Unplugging your modem for three seconds does not work. You need to unplug it for at least 30 seconds so the capacitors inside fully discharge. Unplug the power cable from the back of the modem, count to 30 out loud, then plug it back in. The modem will take two to three minutes to boot up and connect to Cox's network. During this time, the lights will blink in sequence. Wait until the "Online" or "Internet" light stops blinking and stays steady.
If the light never becomes steady after five minutes, your modem may have a hardware problem. Note the exact color and pattern of the lights and call Cox at 1-800-234-3993. They can read the modem's status remotely and tell you whether it needs to be replaced.
Check whether Cox has an outage in your area
Cox maintains an outage map at cox.com/residential/support/internet/outages. Enter your zip code and it will show you whether there is a known outage affecting your address. If there is, Cox is already working on it and you do not need to call. The map usually shows an estimated time when service will be restored, though that estimate often changes.
If the map shows no outage but your internet is still down, call 1-800-234-3993 and tell the representative what you see on the modem lights. They can check whether there is a localized outage that has not yet appeared on the map, or whether the problem is specific to your modem or account.
Restart your router if you have one
Your modem and router are different devices. The modem connects to Cox's network. The router broadcasts Wi-Fi to your devices. If your modem lights show a steady connection but you cannot reach the internet on your phone or computer, the problem is usually your router, not Cox.
Unplug your router for 30 seconds, then plug it back in. Wait two minutes for it to boot. If you still cannot connect, check that you are entering the correct Wi-Fi password — many routers print the password on a sticker on the bottom. If the password is correct and you still cannot connect, restart the modem again, wait three minutes, then restart the router. This sequence fixes most router problems.
Check your account status and device settings
If your modem shows a steady connection but your computer or phone cannot reach the internet, the problem may be on your device, not Cox's network. On a computer, open a web browser and try to visit cox.com. If a page appears asking you to log in or verify your account, your device is connected to the internet but something is blocking normal traffic — this usually means your device has a virus or malware. Run a full antivirus scan.
If no page appears at all, check your device's Wi-Fi settings. Make sure you are connected to your own network, not a neighbor's. If you are connected to the right network but still cannot reach any website, restart your device. If that does not work, try connecting a different device to the same Wi-Fi network — if the second device works, the problem is your first device, not Cox.
Finally, log into your Cox account at cox.com to check whether your bill is overdue. Cox suspends internet service for accounts that are more than 30 days past due. If your account shows a past-due balance, pay it online or call 1-800-234-3993 to arrange a payment plan. Service usually restores within 24 hours of payment.
When to do a factory reset of your modem
If you have restarted both the modem and router, confirmed there is no outage, and your modem lights show a steady connection but you still cannot reach the internet, a factory reset usually solves the problem. A factory reset erases all settings on the modem and returns it to the state it was in when Cox installed it.
To reset your modem, locate the small reset button on the back (it is usually recessed so you cannot press it by accident). Use a paperclip or the tip of a pen to press and hold the button for 10 seconds, then release. The modem will restart and go through its boot sequence again. This takes three to five minutes. Once the "Online" light is steady, your modem is ready to use — Cox's system will automatically reconfigure it with your account information.
If the modem still does not connect after a factory reset, call Cox at 1-800-234-3993. At this point, the modem likely has a hardware failure and needs to be replaced. Cox will ship you a replacement at no charge and walk you through the swap.
Frequently Asked Questions
How long does a Cox outage usually last?
Most outages last between 30 minutes and two hours. Larger outages affecting multiple neighborhoods can last four to eight hours. Cox's outage map shows an estimated restoration time, but that estimate often changes as technicians assess the problem. You can check the map every 15 minutes to see if the estimate has been updated.
Will I lose my Wi-Fi password if I restart the router?
No. Restarting the router (unplugging it and plugging it back in) does not erase any settings. Your Wi-Fi password and network name stay the same. A factory reset is different — that does erase everything — but a straightforward restart is safe.
What should I do if Cox says there is no outage but my internet is still down?
Ask the Cox representative to check the modem's signal levels remotely. If the signal is weak, the problem may be a damaged cable between the wall and your modem, or a problem at Cox's equipment outside your home. If the signal is strong, the modem itself may be failing. Either way, Cox can send a technician or replace the modem.
Can too many devices connected to Wi-Fi cause the internet to go down?
Too many devices can slow your internet dramatically, but usually will not cause a complete outage. If you have 50+ devices connected, disconnect some and see if speed improves. If your internet goes completely down and comes back on its own after a few minutes, the problem is more likely a modem restart or a brief outage, not device overload.
Why does my internet keep dropping and reconnecting?
Intermittent drops usually mean a loose cable, a modem that is overheating, or a router that is too far from your devices. Check all cables first. If they are tight, move your router to a central location in your home, away from microwaves and cordless phones. If drops continue, restart the modem. If the problem persists, call Cox — the modem may be failing.