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Yep the Vaillant guy spotted the 24V link immediately and pulled it out and plugged the 230V in and.....no voltage coming through so it didn't fire up. Apparently that was actually quite 'lucky' as I was told if both connected the PCB can blow. The plumber is coming tomorrow and hopefully can...

aha! thanks for that. Each little bit of information helps me build the picture. Based on that it can only be the fault with the micro switches and /or the wiring?

I agree but the plumber has managed to speak with the Vaillant engineer and has a better idea of what's going on. He is hopefully coming tomorrow with some new actuator valves and with FaceTime can hopefully get hold of the electrician if needed.

Sorry for the slow reply. It is an ecotec plus and still behaving badly. Half the time it does not fire up at all. I am sure HIVE is OK so it must be either the actuator valves and/or the wiring.

Thanks for the reply. I was amazed that the plumber came back last week but the chances of a return visit are looking slim to none at the moment. He did say he would ask the electrician that he works with to see if he can shed any light on the situation. It's easy to plug the 230V side back in...

Hi everyone I'm hoping I can get some advice on the best way forward while we are all locked down. Long story short- in December my Vaillant Ecotec boiler was replaced with a new one. The Hive system was working fine and never had any problems with hot water or heating. When the boiler was...