The quickest way to reset your Comcast modem

A reset clears your modem's settings and restarts its connection to Comcast's network. The fastest method is the soft reset: unplug the power cable from the back of the modem, wait 30 seconds, and plug it back in. The modem will restart and reconnect within two to three minutes. You'll see the lights cycle through colors — this is normal. Once the online light stays solid, your connection is back.

If a soft reset doesn't restore your connection, you can perform a factory reset using the reset button on the modem itself. This erases all custom settings and returns the modem to its original state. A factory reset is stronger than a soft reset but takes longer to complete and may require you to set up your network name and password again.

Most connection problems — slow speeds, dropped WiFi, pages that won't load — clear up with a soft reset. Reserve the factory reset for situations where the modem won't connect at all or won't respond to any troubleshooting steps.

Key Takeaways

  • A soft reset (unplugging and replugging the power cable) fixes most connection problems and takes about three minutes total.
  • A factory reset (holding the reset button) erases all custom settings and should only be used if a soft reset doesn't work.
  • After either reset, wait for the online light to turn solid green or blue before testing your connection.
  • You can check whether your modem is working by looking at the lights on the front — a solid online light means the connection is active.

How to do a soft reset

Locate the power cable at the back of your modem. It's the thick black cord plugged into the wall outlet or power strip. Unplug it directly from the modem (not from the wall). Wait a full 30 seconds — this gives the modem time to fully discharge.

Plug the power cable back into the modem. The lights on the front will flash and change color as the modem restarts. This process takes two to three minutes. During this time, your internet will be down. Do not unplug the modem again or interrupt the restart.

Watch the lights on the front of the modem. You're looking for the light labeled "Online" or "Internet" — it may be green, blue, or white depending on your modem model. Once this light stays solid (not blinking), your connection is restored and you can use the internet again.

How to do a factory reset

A factory reset erases your modem's settings and returns it to the state it shipped in. Only do this if a soft reset didn't work or if your modem won't connect at all. After a factory reset, you'll need to set up your WiFi network name and password again.

Locate the small reset button on the back or bottom of your modem. It's usually recessed (pushed in slightly) so it won't get pressed by accident. You'll need a straightened paperclip or a ballpoint pen to reach it. Press and hold the reset button for 10 to 15 seconds. The lights will flash and the modem will restart.

Let the modem sit for three to five minutes while it restarts. The online light will eventually turn solid. Once it does, your modem is reset to factory settings. You'll need to reconnect to your WiFi network using the default network name and password, which are usually printed on a sticker on the modem itself.

What the lights mean

The lights on your modem tell you whether it's working. The power light (usually on the far left) should always be on when the modem is plugged in. If it's off, the modem has no power — check that the cable is plugged in and the outlet works.

The online or internet light (usually in the middle) shows whether your modem is connected to Comcast's network. A solid light means you're connected. A blinking light means the modem is trying to connect. No light at all means there's a connection problem. This is the light you watch after a reset.

The WiFi light (usually on the right) shows whether your wireless network is broadcasting. A solid light means WiFi is on. A blinking light means data is being sent over WiFi. If this light is off, WiFi is disabled — you can turn it back on using the WiFi button on the modem or through the Comcast app.

When to reset versus when to call Comcast

Reset your modem if you're experiencing slow speeds, dropped connections, or pages that won't load. These problems often clear up with a soft reset. Also reset if your WiFi keeps disconnecting or if you can't connect to the internet at all but the modem has power.

Call Comcast if the online light stays off after a soft reset and a factory reset, or if the light blinks continuously for more than 10 minutes. This usually means a problem on Comcast's end — either an outage in your area or an issue with your account. You can call Comcast at 1-800-934-6489 or check for outages on their website.

Also contact Comcast if you reset the modem and your internet works again, but the same problem comes back within a few days. Repeated disconnections or slow speeds after a reset suggest a deeper issue that a reset alone won't fix.

Resetting your WiFi network name and password

After a factory reset, your modem broadcasts a default WiFi network. The network name and password are printed on a sticker on the modem — usually on the bottom or back. Look for lines labeled "SSID" (the network name) and "Password" or "Key".

On your phone or computer, open the WiFi settings and select the network name from the list. Enter the password exactly as it appears on the sticker — it's case-sensitive, so uppercase and lowercase letters matter. Once you're connected, you can change the network name and password through the Comcast app or by logging into your modem's settings page at 192.168.0.1.

If you've already changed your network name and password before the factory reset, you'll need to use the default credentials to reconnect. After you're back online, you can set up your custom network name and password again through the Comcast app.

Frequently Asked Questions

How long does a modem reset take?

A soft reset takes two to three minutes total — 30 seconds unplugged, then two to three minutes for the modem to restart and reconnect. A factory reset takes three to five minutes. During this time, your internet will be down.

Will resetting my modem erase my internet history?

No. A reset only affects the modem's settings and connection to Comcast's network. It does not touch your computer, phone, or any device connected to the modem. Your browsing history and files stay where they are.

What's the difference between a soft reset and a factory reset?

A soft reset (unplugging and replugging) restarts the modem but keeps your settings. A factory reset (holding the reset button) erases all settings and returns the modem to its original state. Use a soft reset first — only do a factory reset if the soft reset doesn't work.

Do I need to reset my modem if there's an outage?

No. If Comcast is having an outage in your area, resetting the modem won't restore your connection. Check the Comcast website or call 1-800-934-6489 to see if there's an outage. Once the outage is fixed, your modem will reconnect on its own.

Can I reset my modem through the Comcast app?

Yes. Open the Comcast app, go to the Internet section, and select your modem. You'll see an option to restart it. This performs a soft reset remotely — the modem will restart and reconnect within a few minutes, just like unplugging it would.