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Apologies for not updating this sooner, but the weather has been unhelpfully warm for setting up weather compensation. Thanks to bwel, I now have a VRC 470 to enable my VR65 and VRC693 to work. In a well insulated 30s semi, pretty airtight with heat recovery ventilation, the Ecotec Plus 618 is...

Absolutely. Could you message me on WhatsApp? 07477667206

Thanks again, you're right it's horizontal pins. My manual mentions a VRC400, so it looks like I need one of the earlier models. Do you still have your VRC430 by any chance?

It looks like my Ecotec 618 Plus is too old to have the D.043 register, being installed in 2008. No reference to it in my manual, I do have D.047 which reads the outside temperature from the VRC 693, and the VR65 is working to give the DHW override, so I guess I'll need to find a VRC 470 to make...

Thanks so much for that, I'll post any results here later.

I've ordered a VR65 and a VRC693 from the bay of fleas, having read these helpful posts. The weather compensator has a connection block included, which I assume should be fitted to the boiler PCB position X41. How do you set up the heating curve with the boiler d. code please? I have an ecoTEC...