Comcast Internet Not Working? Step-by-Step Troubleshooting Guide
Before you spend an hour on hold, work through this short checklist. It separates problems you can fix yourself from real outages, and it tells you exactly when it is time to report an issue or contact support.
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Step 1: Check whether it is an outage
Look at the status card above and the recent reports for your city. Several reports in the last hour from your area means an outage is likely and your own equipment is probably fine. If there are no nearby reports, continue with the steps below.
Step 2: Restart your equipment
- Unplug the modem and the router (or combined gateway) from power
- Wait a full 60 seconds
- Plug in the modem first and wait until its lights settle, about two to five minutes
- Plug in the router and wait for WiFi to return
Step 3: Check cables and lights
Make sure the coaxial cable is finger-tight at both the wall and the modem, and that no cable is bent, chewed, or loose. Note the lights on your modem: a blinking or missing online light usually means the modem cannot reach the network, which points to a line or outage problem rather than a WiFi problem.
Step 4: Isolate the problem
Test another device and, if possible, connect one by Ethernet. If a wired device works but WiFi does not, focus on the router. If nothing works, the connection is down. Also check whether only one website or app is failing, which suggests a problem with that service rather than your internet.
Step 5: Report and contact support
If the connection is still down, submit a report here so neighbors can see the pattern, then contact your provider with the time the outage started and what you already tried. Our phone number guide explains how to reach support.
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Frequently asked questions
Why is my Comcast internet not working?
It could be a local outage, a modem or router problem, or a loose cable. Check nearby reports first, then restart your equipment.
How long should I wait for my modem to reconnect?
After a restart, give it up to five minutes. If it still shows no online light, the problem is likely not on your side.
Should I replace my modem?
Only after restarts, cable checks, and outage checks fail, and ideally after speaking with support.
Does restarting always help?
No. Restarts fix many equipment glitches but cannot fix a provider outage.