ASUS rt-ac86u stops broadcasting 2 ghz

Island

Occasional Visitor
Greetings fellas- I have read all the threads with the 86u hardware issue with the wireless channel and wanted some feedback and help from you guys if possible? I purchased 2 of the 86u's back when they first came out, so I've had them installed for almost 2 years. I also have a rt3100 that has been running perfectly for almost 3-4 years. I set up a mesh network awhile ago and like a lot of people, I had been getting a lot of disconnected devices on the 2 ghz channel which would only correct itself with a reboot of all the routers.

I have been using one of the 86u's as the main router and the other 86u and 3100 as mesh nodes. I use the Asus factory firmware and update religiously and have had the wireless issue with every firmware upgrade, so I believe the problem is hardware related. I narrowed it down to my 86u that is the mesh node. What will happen is after a day or 2, I've noticed that the 2ghz channel on the 86u will just stop transmitting. The activity light will remain solid and all the 2ghz devices connected to it will end up connecting to the main router or will stay offline.

I have found that disabling wifi on the node and turning it back on will re-establish the 2 ghz channel and my devices will reconnect once again. This happens with smart connect enabled or disabled and also setting the 2 ghz channel manually. I am thinking that the 86u node has a hardware issue but I am not certain.

Sucks having to do this every other day to get my mesh system to work properly. I was wondering if there was some way I could insert code to reboot the 2ghz channel everyday to reset it or if there was any fix you guys could recommend? Seems like this is a known issue that Asus wants to sweep under the rug?? Thanks guys!
 

OzarkEdge

Part of the Furniture
Greetings fellas- I have read all the threads with the 86u hardware issue with the wireless channel and wanted some feedback and help from you guys if possible? I purchased 2 of the 86u's back when they first came out, so I've had them installed for almost 2 years. I also have a rt3100 that has been running perfectly for almost 3-4 years. I set up a mesh network awhile ago and like a lot of people, I had been getting a lot of disconnected devices on the 2 ghz channel which would only correct itself with a reboot of all the routers.

I have been using one of the 86u's as the main router and the other 86u and 3100 as mesh nodes. I use the Asus factory firmware and update religiously and have had the wireless issue with every firmware upgrade, so I believe the problem is hardware related. I narrowed it down to my 86u that is the mesh node. What will happen is after a day or 2, I've noticed that the 2ghz channel on the 86u will just stop transmitting. The activity light will remain solid and all the 2ghz devices connected to it will end up connecting to the main router or will stay offline.

I have found that disabling wifi on the node and turning it back on will re-establish the 2 ghz channel and my devices will reconnect once again. This happens with smart connect enabled or disabled and also setting the 2 ghz channel manually. I am thinking that the 86u node has a hardware issue but I am not certain.

Sucks having to do this every other day to get my mesh system to work properly. I was wondering if there was some way I could insert code to reboot the 2ghz channel everyday to reset it or if there was any fix you guys could recommend? Seems like this is a known issue that Asus wants to sweep under the rug?? Thanks guys!
If the AC86U radio(s) do not stay ON and stable after a factory default reset, I would replace it. You could reset, reflash, and reset again; but that won't fix failing hardware.

OE
 

Island

Occasional Visitor
If the AC86U radio(s) do not stay ON and stable after a factory default reset, I would replace it. You could reset, reflash, and reset again; but that won't fix failing hardware.

OE
Thanks for the reply Ozark- The 2ghz channel does stay lit on the 86u mesh node but it is solid and their is no "blinking" to show the channel is transmitting. My main router and 3100 2 ghz channels are working fine. I have done a factory reset on the 86u node and the problem persists. I would assume Asus will not help as my 86u's are probably close to 2 years old?
 

CaptainSTX

Part of the Furniture
If your AC86 was manufactured in 2018 the 2.4 Ghz radio failing was a common failure mode. Usually sooner than a year but there were also complaints about it happening soon after the router's one year warranty expired.

If the nuclear resets don't give you a stable router then time to move on.
 

L&LD

Part of the Furniture

OzarkEdge

Part of the Furniture
Thanks for the reply Ozark- The 2ghz channel does stay lit on the 86u mesh node but it is solid and their is no "blinking" to show the channel is transmitting. My main router and 3100 2 ghz channels are working fine. I have done a factory reset on the 86u node and the problem persists. I would assume Asus will not help as my 86u's are probably close to 2 years old?
You'll have to determine and process any warranty. Asus replaced one of my AC86Us at 23+ months under its 2-year warranty (US).

OE
 

Vimes

Regular Contributor
You'll have to determine and process any warranty. Asus replaced one of my AC86Us at 23+ months under its 2-year warranty (US).

OE

I was hoping that my AC86U, bought in Nov 2017, would have a three years warranty (UK) as mine has recently started to fail only on the 2.4Ghz radio...


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regardless of hard reset and manually entering settings every few days it seems that the 2.4Ghz radio will still show its SSID but nothing will work on it. A reboot of the router isn't needed, I just need to stop and restart the 2.4Ghz radio and all is well for a few days.

I'm going back to the std firmware, never used that in three years as I have always used Merlin's.

I'll check the warranty status, thankfully I did register it.

Thankfully it is still in warranty. It is guaranteed for three years.

Agent advised going to an older firmware as they have received calls about this latest one giving similar issues. If it works then great if not I'll return the router to Amazon.
 
Last edited:

Island

Occasional Visitor
I was hoping that my AC86U, bought in Nov 2017, would have a three years warranty (UK) as mine has recently started to fail only on the 2.4Ghz radio...



regardless of hard reset and manually entering settings every few days it seems that the 2.4Ghz radio will still show its SSID but nothing will work on it. A reboot of the router isn't needed, I just need to stop and restart the 2.4Ghz radio and all is well for a few days.

I'm going back to the std firmware, never used that in three years as I have always used Merlin's.

I'll check the warranty status, thankfully I did register it.

Thankfully it is still in warranty. It is guaranteed for three years.

Agent advised going to an older firmware as they have received calls about this latest one giving similar issues. If it works then great if not I'll return the router to Amazon.
If u read my original post, mine is doing the EXACT same thing! Definitely must be an issue with these routers. I just put in an email with Asus tech support. Let's see if they give me the run around and tell me I'm S*** out of luck or they somehow do the right thing and Send me and RMA for this faulty router
 

Vimes

Regular Contributor
If u read my original post, mine is doing the EXACT same thing! Definitely must be an issue with these routers. I just put in an email with Asus tech support. Let's see if they give me the run around and tell me I'm S*** out of luck or they somehow do the right thing and Send me and RMA for this faulty router

That's why I replied in this thread. Noting that yours' is doing the same thing. Going back to a previous firmware might or might not resolve the issue. But I have now got a reference number to return it back to Amazon authorised by Asus. if needed. That is at least something.
I don't need to return it to them but Amazon if needed.
 

retuor

Occasional Visitor
What will happen is after a day or 2, I've noticed that the 2ghz channel on the 86u will just stop transmitting. The activity light will remain solid and all the 2ghz devices connected to it will end up connecting to the main router or will stay offline.
I had this same issue and more. I also wrote about it in a past post:

https://www.snbforums.com/threads/is-the-grass-greener-on-the-asus-side.64156/post-585055

Not only was 2.4 going out, sometimes it would be the 5 instead. And sometimes when 2.4 is going crazy, the node's 2.4 LED would actually be flashing instead of solid. Whatever the case, some of my 2.4 devices that were previously connected were now disconnected. The only resolution was rebooting the router(s). If I check the router admin before rebooting, the Wireless Log would show one of these strange things: the node router would not be listed as a client in the 2.4 or 5 list, the Wireless Log would be truncated after the 2.4 info (meaning there is no info about the 5).

I went through 2 replacements and firmware hopping, resets and settings adjustments and still nothing. Even the latest ASUS firmware auto-update didn't prevent this issue from occurring again. At one point when I was firmware hopping, I managed to get about 30-40 consecutive days of no issues with main 86U at x81352 and node 86U at x81369. But I forgot if I changed something or the router(s) did something.

However I think I might have finally found something.

I suspect it's a combination of resetting and one of my 2.4 IP cameras.

After two reboots on the same day, once in the afternoon and another in the evening, I finally decided to reset and re-flash the firmware to the latest, x82072, using ASUS Firmware Restoration Utility software. I also entered the settings manually instead of using the "restore-settings-from-a-file" feature so that I can see the differences from the firmware's defaults. I did this b/c my settings were made on a firmware version before ASUS did the firmware auto-update. I accepted the firmware defaults for any of the differences that I didn't recognize.

For wifi, what I do is name the SSID's to something else. (I don't use SmartConnect.) It's because I don't want my devices to connect while I'm still configuring the routers. Then I add the AiMesh node and place the node in the location that I want. Finally after everything is configured and both routers are connected in AiMesh, I then change the SSID's back to their original names so my devices can connect.

For 2.4, I turn off roaming assistant, disable Airtime Fairness. I use 20 MHz and Ch. 6 but everything else is firmware defaults. For 5, I do enable roaming assistant but disable Airtime Fairness. I use "N/AC mixed", 20/40/80 MHz and Ch. 149 but everything else is firmware defaults. The next day unfortunately one of my 2.4 IP cameras disconnected. After some investigation, I decided to update its firmware and I haven't had any router disruptions or client disconnects for about 3 days now.
 

Vimes

Regular Contributor
My continuing issues.....

Great......(not)

Asus believe that my router has an hardware fault following further 2.4Ghz radio issues and they wish it to be replaced. Checked warranty status and it is still within warranty but they have an agreement with Amazon to process their returns and replacements in the UK.

Amazon.....Sympathised but will not agree to such a return and then told to deal with Asus directly.

Amazon Management...... Agree, sympathise but not something that we will help with. We will not process any returns on behalf of Asus.
Asked them to confirm that by email, which they did.

Asus - it is typically always Amazon where we have these issues. Other smaller retailers have no issues with this arrangements. We will escalate this and get back to you.
Asked for invoice as well as Amazon's response to be sent, which I did.

Not the best of starts.
 

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