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PurpleNurple9's avatar
PurpleNurple9
Aspirant
Aug 01, 2025

AC1900 extender connection problem

My old AC1900 and AC1200 extenders will not allow my WiFi devices to connect, after CenturyLink installed a new modem router: C4000BZ. I am able to get the extenders connected to the CenturyLink, but...
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PurpleNurple9's avatar
PurpleNurple9
Aspirant
Aug 03, 2025

Thanks for responding. Here are the model numbers:

AC1900= EX7000

AC1200= EX6200

 

I did factory resets several times with the same result. 

FURRYe38's avatar
FURRYe38
Guru - Experienced User
Aug 08, 2025

What security mode do you have set on the C4000 ISP router? 
First try no security temporarily to see if any of the extenders will connect in the open. 
Then Set WPA2 and either TPIK or AES, AES would be preferred.

Set manual channels 1 and 40 on the ISP Router as well. 

PurpleNurple9 wrote:

Thanks for responding. Here are the model numbers:

AC1900= EX7000

AC1200= EX6200

 

I did factory resets several times with the same result.