@Danize 

Hi, I have the second TP-Link Archer C60 because the first Hardware version V2 that I had has problem with OpenVPN, now I have this C60 new hardware V3 and have the same problem that yours, wireless 2.4ghz stop work and 5Ghz and wired connections continue working.

Hardware: Archer C60 v3.0

Frimaware: 1.0.2 Build 20190821 rel.72820(4252)

Thank´s

Ricardo.

Same issue as everybody else. I have only had the router for three days. The 5g connection has been working fine and the 2.4g worked for the first few days. Now, all my devices can see the 2.4 but can't connect. The 5g is still working. It's very frustrating. 

@Psky 

I set in my Archer C60 1.0.2 Build 20190821 rel.72820(4252) fixed cryptography Wi-Fi 2.4Ghz to fixed AES , looks like it improved, try it!

Thank´s

@rpotalara Wow! it looks like that worked. Thanks!

@rpotalara 

Can you elaborate?  none of what you said makes sense

@Luke_B For me, I went to wireless-wireless settings-advanced and under the 2.4 ghz, there is a setting for encryption that is either set to auto, tkip or AES. Mine was set to auto but I switched it to AES and then everything could connect. 

@Psky , @Luke_B Exact! I dont know if this a solution but for me for a moment solve problem.

ARE YOU GUYS FOR REAL?!? I have bloody purchased this router not a week ago, and every few hours 2.4Ghz keeps dropping. I tried EVERY possible troubleshooting method but nothing worked. You won't fix it and you WON'T REFUND IT, what the hell? I got a replacement and it's the same goddamn issue. Either you fix your firmware or give me a refund.

@VRG HI, Yes you are correct! But many of us brougt this router a many years and didn´t have more garantee. What´s you firmware and hardware version?

Thank´s

Hey @rpotalara,

I own the Archer C6 V2 with the current available latest Firmware Version 1.3.6 Build 20200902 rel.65591.

Also, this means that they haven't fixed this problem for over 3 years?!?

I mean... isn't this ridiculous?