intermittent internet connection on S33

  • 9 April 2024
  • 1 reply


I purchased an Arris S33v2 last November. We have been having at least 2 to 3 short dropouts daily. We thought it might be a cable issue as the upstream voltage was a little high and downstream was a little low. (Also saw some UCD invalid or channel unusable messages in the event log)

Ran a new RG6 Quad coax directly from the outside cable box to the modem. The voltages fell within the normal range but the daily reboots continued.

The Xfinity tech recommended getting a different modem. I already had my old SB8200 so I installed it. It has been up several days now with zero dropouts.

How do I go about getting a warranty replacement?


Best answer by SURFboard Moderator 11 April 2024, 02:24

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Userlevel 5
Badge +41

In this case if your modem is under warranty you can reach out to so you can get connected to our phone support team to proceed further.