pair not connected on 2 of my era 100s

 Are the two 100s in the lounge set up as surrounds with the Beam/Sub?  Is the kitchen pair set up as a stereo pair?  When you say “merge” do you mean play both the lounge & kitchen at the same time?

My lounge are set up as surrounds and the kitchen as a stereo pair I'm sure, I can't check this though as the app won't find them.

Yes that's what I mean, but it's not only when I try and play them all that this happens.

 How far from the router is the kitchen?

About 6m router to speakers on the same floor, all open plan so just a understairs door in-between them!

The lounge is slightly further away than the kitchen tbf.

 Strange!  Seems like the kitchen should connect better than the lounge.  If you ever get the kitchen connected again check the SNR.  Settings gear-Era 100-Network.  Look for SNR.  If less than 25 that could be an issue.

 Two things I had to do was: first move the router up to a higher level ( on a book case ) and second purchase an extender for the Xfinity WiFi.  My kitchen is about as far away from a router as you can get.  Long single story ranch.

When I did our refurb I ran cat6 everywhere so I could chuck an extender in, but it shouldn't really need it over that distance, thanks for the replys I'll check it out when it finds it again. 

Thinking about it, I can play music through them direct from Spotify so they must be connected to my wifi fine, maybe an app issue?

It's all there on my Spotify just not the Sonos app, which I need to turn the multi room on 🤦

 Also if possible check to see if they are on 2.4GHz or 5GHz.  I have band steering where the router tries to give you the best connection.  Don’t like that but so far it works.  Music streaming does not need the speed advantage of 5GHz.  The issue with 5GHz is it does not penetrate walls as well as 2.4GHz.

 Another thing that you may want to do, also if possible, is go into your router settings and Reserve the IP Addresses for all devices.  It’s not static IP Addresses; Your still using DHCP to get dynamic IP Addresses it’s just that the address assigned is always the same when reserved.

 Apologize if you already know all this.

 Just saw the Spotify info.  Yes…. It’s probably the Sonos app.  So far with Sonos I’m connection issue free.  Just jinxed myself.

Hi @Richyroo 

Welcome to the Sonos Community!

Generally, issues with grouping (when they are not due to interference) are due to mismatches between the speakers’ software versions.

Are you still having this issue? I can see that all your speakers are on the same software, so I am hoping that this issue has now disappeared? If this is not the case, please let me know.

I hope this helps.

Hi Corey, yes I still have this issue! The left speaker has come back online after 5 days of being offline, but the right is still offline

Moderator edit: removed images with Serial Numbers

Hi @Richyroo 

Understood. In that case, could you please attempt to group the rooms together, then submit a support diagnostic when it fails? Please let me know when you have done so, but don’t share the given number. Thanks.

So I have grouped the 1 speaker which is showing up in the kitchen with my lounge, I'm not getting an error message and they are only playing in the lounge! Both kitchen speakers are working when I select them direct from Spotify so this is not a wifi or connection issue.

Hi @Richyroo 

I am afraid that without a diagnostic to look at, I cannot help.

Please either submit a support diagnostic and reply here letting me know when you have done so, or, I recommend you get in touch with our technical support team who can go through some real-time troubleshooting with you.