A factory reset should be a last resort. 
When changing routers the easiest thing to do would be to power off all your speakers then swap the routers. Configure the new router the same SSID and password as the old router, then one by one power on your speakers.

If the Connect doesn’t automatically connect, connect it directly to your router with a cable temporarily and check for updates.

Thanks for the reply.

I just followed instructions from Sonos website… Connect unit too far from router to connect via ethernet.

Think it’s the end of the road for Sonos in this household.

If you dont mind, can you explain why?

Why it’s the end of the road?  Well, I’ve had numerous problems this year with Sonos and this is just another one, perhaps one too many.

Don’t really want to part company with them as I really like the windows app, for a blind person like me, it’s so easy to use… I guess the only option is to buy a Port if I can’t resolve the issue with the Connect… or a Bluesound.

You can unplug the Connect and temporarily move it adjacent to your router you know. Once it is set up, move it back.

Done that, still can’t find product.

Anyone from Sonos going to bother to help me with this?

This isn’t a ‘Sonos customer support’ forum, it’s a Sonos Community forum, which means, beyond the rare and occasional responses from the Forum moderators, you’re going to get a lot of community feedback. If you want to talk directly to Sonos Support , you’ll need to call them. 

Iaimed my question at them, as they answered and managed to solve my last problem, thanks anyway.