Visitor

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4 Messages

Wednesday, January 7th, 2026 12:23 AM

Chronic intermittent signal issue. Requesting Line Maintenance

Hey there,

I’ve been lost for hours with chat going nowhere and having my modem’s MAC address re provisioned for the second time in a month just to get back up and running is frustrating. A technician is scheduled for Sunday, but I think I need someone else! I’m reaching out because I’ve been dealing with a persistent connection issue that’s definitely on the street side, and I’m hoping to get a Network/Line Tech to check the local node.

I’m running a Netgear CAX80 (Broadcom chipset), and while the hardware is healthy, the signal coming in is trashed. Earlier today at 2:57 PM, I was getting a perfect 322 Mbps with an 11ms ping. But minutes later, the whole thing fell apart again.

The proof it's the line:

• Sync Loops: My logs are full of Code 16 (Loss of Sync) followed by Code 24 (Recovery) over and over.

• Packet Destruction: I’m seeing 29,346 Uncorrectable Codewords on the OFDM channel right now.

• Walled Garden: These signal drops are so bad they’re breaking the authentication, giving me 'Your connection isn't private' errors and certificate warnings.

• Network Chaos: It’s hitting every device in the house. My Apple Watch has been flooding the logs with DHCP requests just trying to stay connected while the line flaps.

My modem is pulling a solid 41.5 dB SNR, so the hardware is doing its job; it just can't handle the 'dirty gas' coming from the street.

I’ve already checked my internal wiring. Can you please skip the standard home visit and just have a Line Maintenance crew look for noise leaks at the tap or neighborhood node? I don't want to waste anyone's time with a home tech for a line failure.

Thanks for the help.

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Official Employee

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2.1K Messages

2 days ago

 

user_4lbbcn I appreciate you doing some checks on you end, and you may need a technician at this point. Did you try any troubleshooting from our Xfinity app? 

 

Visitor

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4 Messages

@XfinityShawn​ yes. Hence the technician they are sending Sunday. The app support said it was a hardware issue because I’m using my own, but I’m fairly certain it is not my modem/router. After reviewing the logs and factory reset it looks like an outside issue. I’ve not had to ask anyone to re authorize any modem that I can recall, so it’s pretty unusual to get that level of dropping and noise to kick off that level of failure.

Official Employee

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2.1K Messages

@user_4lbbcn yea most of the time an issue like this is not a modem issue. Sometimes it can be, but there is no way to know for sure without a tech taking a closer look at your location. But we most commonly see repairs being needed beyond the modem in a situation like this. But a service tech needs to do initial tests and diagnostics. Then follow specific steps to refer work to our maintenance team if needed. 

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Visitor

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4 Messages

@XfinityJosephA​ I figure as much, but was hoping to get the right person out quicker. I’m probably getting this all mixed up but I’ve read that they can check the neighborhood node health via Watchtower to see if this is affecting my neighbors, as that would confirm it’s a Plant/Maintenance issue rather than a home issue. We work from home and the internet is rather important. The speed is awesome when it works, so trying hard to stay a loyal customer. Despite the first line support adding things (Now Tv as a thank you!?! For $20) to my bill or enrolling me in rewards and issuing a .10 credit after losing nearly two whole working days to troubleshooting in the last month! 

Official Employee

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2.2K Messages

You're thinking the right way, @user_4lbbcn! We just don't "jump" to some of the steps you've mentioned without having at least a few regular visits within a month or so. Sometimes we can get things resolved with normal Trouble Calls (tech visits), and there's a process we must follow before being able to escalate things further (such as to our Maintenance team). The field tech(s) who come out should be able to do this as well, and since they're our first line of defense, we want to start there. So, how about we follow up with you next week to see how Sunday's visit went and go from there? You're in excellent hands with our team here because we'll step in and go above and beyond when an account or services need special attention.

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Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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Visitor

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4 Messages

1 day ago

The good news is that I’m holding steady at 30k of uncorrectable codewords (same as last night after the reset, but my modem had to 'fix' over 1.7 billion packets just to stay online. Unless the normal operation of Xfinity is to have your setup repair almost half of my total traffic? Even though my signal levels look 'green' on your end, this error rate suggests the street line is physically failing. I need a tech to find the noise at the tap or node, because the hardware is clearly struggling to keep up.

Official Employee

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2.1K Messages

 

user_4lbbcn our techs are very good at what they do, and they will follow the right process to identify the issue. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick
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