Hi Volker
Thanks for that - your answer stated - "The HomeKit code is on a sticker on the accessory" - and, as all four of the Eve units are fitted to radiators, my question was, Where is the sticker on the Eve unit, as I cannot see a sticker on any of them. So I have had to remove a unit from a radiator and then reinstall it - I hoped not to have to do that - to find the sticker is on the back on a fitted unit - not visible to a user. That was all I wanted to know - Thanks for your help.
Stay safe
Feb 13, 2021