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Saturday, May 9th, 2026 6:22 PM

Unifi Cable Internet Modem

I recently added a Unifi Cable Modem to my home network. I had no significant network issues on my old modem. I contacted customer support, they added the new modem to my account. It worked fine for about 24 hours. Around 415AM CST today the Unifi modem quit working. I power cycled and still no connection. I contacted customer support and they had me power cycle several times. The modem takes longer than usual to boot now and always ends up on the "Reboot Required" screen. Tier 2 Support did basically the same thing. A customer side power cycle and pushed a config file. Still same issue. It seems like a boot loop. Considering the modem worked fine for 24 hours and now after customer service has attempted several restarts and configs, I'm concerned there's some behind the scenes (at Xfinity) provisioning loop causing an issue. I see on the forums here that UCI modems have this issue and usually are resolved from the Xfintity side. Could someone please provide assistance?

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2.2K Messages

6 hours ago

Hello, @slowfalcon how are you? This issue could be the modem or a signal issue. Something that comes to mind is connecting the previous modem to see if the same issue persists. This can troubleshoot a potential modem issue. If the issue only happens with the Unifi you can also bypass splitters between the modem and the wall and make sure your connections are tight and in good condition. Taking these steps can help identify the issue and at least give us more information. 

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