How to remove old Speaker from Account and Google Assistant

NicoWu,

It perhaps depends on what routines you have setup, but as you have only a few (smart-home) items (fan, thermostat, sonos etc.) currently setup in your Google Home, you could just (for ease, perhaps?) choose to delete/remove the device skills/actions from the Google App and if you need/want, also quickly delete and recreate your Google Home too (or create another Home) in your account and just start from a blank canvas. It will not take long with just the few devices you have. See if that resolves your issue. 
 

If you do have more than one Home in the App and only need the one, then get rid of any you don’t require and also remove any other users sharing your Home (for now, at least). Once you sort everything you can always share your Home again, if necessary.

Hope you get it sorted.👍

I found the solution, maybe that will help others. I use multiple Google Accounts on my iPhone. It seems like the account of my son was active, when I added the Sonos speakers to Google Home. 
So later it was not possible to remove Sonos speakers while my own account was active - and they appeared twice, and there was a big confusion when controlling my Sonos speakers via voice commands. 
The Solution: try out every account in google that you have access to and try to remove the speakers. You will be able to remove the speakers when you use the account that you used to originally add the speakers to google home. 

In fact that was the reason I suggested you delete your Home and start with a blank canvas - anyhow glad you sorted it.👍

I have one google account, and one ‘home’, but I cant figure out how to remove the old Sonos devices that have been traded in from Google Home. These devices still show in my Sonos account as ‘Re-Cycled’

I don’t really want to start with a blank canvas, as I have other devices, Nest etc, I suspect that will break something else.

My solution at moment is to move these phantom Sonos devices to a room ‘ZZZ Old Devices’ so the old Sonos devices are just hidden at bottom of Google Home, but would be nice to delete them somehow.

Anyone found a solution without deleting everything in Google Home?

Go to the Sonos ‘Skill’ added to the Google Home App and long press it and choose to update your Sonos devices. See if that solves it for you.

Thanks Ken. I assume what you suggest is for Android, I have iPhone, so I did something similar from Google Home App on iOS:

Settings

‘Works with Google’

Sonos

Check for new devices

The above failed after 30 seconds. Tried again, failed again, so I bit the bullet and clicked ‘Unlink account’, then relinked, and all OK now.

I use iPhone too - just goto add a device and select the option that relates to ‘you have things setup already’ then in the ‘skills’ list just press and hold the Sonos skill to ‘check and update’ devices.

You are not seeing what I’m seeing in Google Home App.

I click ‘+’, ‘Set up device’

I see ‘New Devices’ and ‘Works with Google’

I click ‘Works with Google’, ‘Sonos’

I see ‘Unlink Account’ and ‘Check for new devices’

You say skills, isnt that Amazon Alexa?

It’s the ‘check for new devices’ option - it refreshes the Sonos devices connected to the Home on the local network..  if it fails for you, then unlink and re-link the Sonos skill/action/device/app or whatever you call it.