Internet Connectivity Issues for the Past Month

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Thanks for responding.

I saw a similar post on this forum where the solution was to eliminate any unwanted coax splitters. The Xfinity tech initially set it up with a 3 way splitter with two of the coax cables being unused. I removed the three way splitter and unused coax cables and replaced it with a two way three weeks ago, yet we are still having issues.

As far as the quality of the cables - this is a brand new home with new wiring. All of the fittings look correct without any noticeable damage and were setup by the tech when we first moved in.

Are there any other troubleshooting measures or is this something only a tech can address?

Looks like there is not much else that you can do then. It may be best to get a tech out to investigate.

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.

Good luck with it !

Well I tried getting a tech to come - the first customer service rep scheduled a tech to come between 7:30-830am today. Nobody came and when I called Xfinity to find out why, they said there was no appointment made and that they will not be sending anyone since it''s not an emergency. 

Fantastic - so I'm basically stuck paying for internet that doesn't work?