Intermittent internet connection, model c7000v2

[RouterC7000v2]

Internet connection drops for 5-50 seconds every now and then, Xfinity suggested checking wifi channel and reconfiguring the modem. Even though the modern is in warranty Netgear is refusing to help as the support warranty is only for 90 days. The problem was there from day 1, it took time to realize that the problem might be with the brand new router. How to resolve the issue?

[plemans]

does the issue happen with wired and wireless device? 

Only wireless devices? 

[footbal9584]

I am having this EXACT same problem and it's not related to the WiFi Router. I switched back to my old ARRIS modem and it is working perfectly fine.

Power levels on all channels ranged from 1-3 dB, no errors in the logs.

My plan is to get another one to test with and if I am having the same problem to try a different brand.

[RouterC7000v2]

Both, with wired and wireless.

[plemans]

@RouterC7000v2 

do you have a screen snip of the cable connections page and the event logs?

[RouterC7000v2]

No, I have no idea how to generate these. 

Update: I changed the channel to 10 from Auto (which was on 11) and it seems fine so far, but I need to monitor for the entire day or two to see if it really resolved the issue.