High Downstream Power Levels on Arris S34 Modem – Normal or Needs Adjustment?

Isn't this quite a bad sign though and just begging for future problems? My modem is running at 140F

Thank you for reaching out to us on our community forums @deezly! I see our expert EG took a further look at the signal levels you sent. Typically, the modem's temperature should be fine as long as the modem is in an open, elevated, and well-ventilated area. As EG recommended, you could look into other alternatives to help cool the device. 

I noticed you also sent a direct message. Please be reminded that sending unsolicited Direct Messages to an Official Employee of the Xfinity Community Forum, is a violation of Forum Guidelines. In the future we ask that you please wait to be invited to send us a Direct Message. 

You mentioned experiencing ping issues. Are you referring to ping issues experienced during online video games or pinging your device?

Thank you for the response and for clarifying the guidelines on DMs—I'll make sure to keep everything public here in the future.

To answer your question, the ping issues I'm referring to are occasional spikes and higher latency during online gaming sessions (e.g., in games like Valorant or Call of Duty), where it jumps from my usual 20-30ms to 100ms+ for brief periods. It's not constant, but it happens a few times a day, often correlating with the T3 timeouts I see in my modem's event logs (I've got several per day, as shared earlier). No full disconnects or speed drops, though—downloads/uploads are consistently hitting my plan's specs.

Regarding the signal levels, I appreciate EG's input, but I'm still a bit concerned about the downstream pushing 14.3 dBmV consistently, especially since the modem (Arris S34) is running at 140°F internally even in a well-ventilated spot (ambient room temp ~75°F).... but I'm wondering if this could be contributing to potential long-term wear or the ping spikes.

Could you or the team take a remote look at my account/signals to see if a tap adjustment or something on your end might bring the downstream closer to the optimal 0-7 dBmV range?

Thanks again for the help!

Sure thing, deezly! We can move back to that direct message you sent earlier, and if you could please provide us with your full name and service address, we'll see what we can find out.