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Sorry I am talking rubbish. Nothing in the Spares however there is a link between the Live and Pin 3 and nothing in pin 4. So I am fine with everything there but that there is a link and that there is nothing in Pin 4. The C27 it seems requires CH OFF and not CH Common. Any Clues?

Thanks Chris thats great! I do however remember something being connected to the spare when I looked at the connections on the back of the SP100, is it likely that this is for the stat? I understand that any advice given is to be treated only as advice though :wink:

My apologies Tony, I guess I was hoping for a straight swap with just the terminal numbers etc.... I have a potterton prima F boiler and a Danfoss HSA3 valve if that helps. Thanks Olly

Hi, I am new to this so bear with me. I have a broken Sunvic SP100 (just stopped working) and I have bought a Horstmann C27 to replace it. I was hoping that someone could point me in the right direction as to what needs to connect to what as a direct swap. I have not disconnected anything yet...

I am afraid so.....

Hi, This is my first post here with a problem in my first house. I have a problem with my mixer tap/shower in my bathroom. First some background information....I have a hotwater tank and a tank in the loft for cold water. The pressure is good for the cold water and ok for hot, however the...