Hi All, My first post. This is partly my fault for now keeping tabs on this. Around 3 years ago, I had two boilers installed on two rentals houses. Unbeknown to me the installer did not register either of them. So I contact the installer, he claims he has an issue with the Vaillent portal etc. Upshot is he said he can't register. I contact Vaillent who say i need to get the installer to register. Going around in circles here. Roll on again 3 months ago. I have a Vaillant boiler installed in my own home. I phone up Vaillant to check and lo and behold no registration from the installer.. I'm constantly chasing the installer to get it registered. Any advice what else I can do? Thanks in advance.