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My mistake. the water is heated as well when I have the central heating on.

It had been on the same circuit as some of my lights but there was a free 5amp 'channel' on the consumer board unit so he moved the boiler controls onto that and kept the lights on the other circuit.

Taylor, I see you have 'With every mistake, we must surely be learning' as a comment on your post yet your throwing out insults when people ask questions. And I had attached a basic diagram of the wiring panel for the Horstmann C27 to run the boiler so I was taking it to be channel 4 to...

Have disconnected cable from 4 and left hanging. boiler doesn't come on. I presume this is meant to happen? Will post again after half an hour. In theory is just the pump running then? Where would be the best place to look for the value? Hotpress cupboard?

Boiler is Warmflow 50/70 and fully pumped system.

Think it's Y Plan.

Hi all, I am having issues with my Horstmann C27 which keeps blowing the 5 amp consumer fuse. Used to have the Horstmann C17 before and had been working for a few years. One day when I used the Boost button it tripped the 5 amp fuse and screen went blank. Replaced the fuse but it kept blowing...