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The brand on expecting of three port valve is a centre

Hi all, thank you all for you professional insights it's much appreciated. I do have a honeywell dual st9400c as well that I could fit but and wire it as per the label but no one knows where the orange wire should go from the 3 port mis position valve. If fails we pay for someone to come in...

Yeah mate it's very strange. Worked fine for couple months and then off late it's been on and off and now won't come back on. Was hoping someone would see it and be oh that needs to be done etc or so and so needs to be replaced. Wishful thinking right. Soon as I'm back indoors I'll upload a...

It didn't buddy

Unfortunately I inherited this but will have to just get someone in to do what you guys do for a living. Thank you all for your input.

Hi mate, Are you saying remove the orange altogether. I can put grey into one. What color wire should go in to 3 you have marked cylinder? I have tried with just the three standard wires and still don't come on. I tried a new programmer as well same one but still no joy

Do you gents perhaps think it maybe the RCD board or a circuit breaker causing the issue? All over appliances on there work unless I put a bigger amp fuse in the spur than a 3 or 5amp it will trip that one circuit.

Should the orange wire be located somewhere else or not at all? Thanking you both for your time Tj

Hi CBW, thank you for your reply. I have checked all connections and tided them up but still no joy. I'm in the ss13 2dj basildon area. Tj

Hi All I'm looking for advice on my hot water and heating issue. I have an oil fired Potterton statesman boiler that works absolutely fine when the Honeywell st9100c programmer works. However lately the programmer last about a day and turns off completely. At first, I could change the fuse in...