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You absolute legends!!!!! I cannot thank you enough. Wish I could buy a round....really appreciate it xxx

....oh hang on...very delayed firing. The HW has now fired up! Omg!!!!!

That's odd. So I turned the thermo up all the way. Switched the switch for CH, and now it goes on and off. I then go to turn in the HW, and that wont fire up the boiler...... Wtaf.......

What do you suggest? Take the link out? Do you think that will allow the central heating to work as well as the hot water?

Yeah sure!

Ok. Done that. Now the hot water turns on and off, but the central heating doesnt turn on. Its reversed the problem.

The grey wire at the moment is in L to 3. If I move it from 3 to 4 both heating and hot water are on together and the switch on the control panel will not turn them off.

It was in the 4th terminal, but I'm not sure about the other.

....just to add. I had a friend try and help me over the phone last night. We discovered that if you take the grey wire out of makes no difference to the central heating working- but we couldnt fathom out which port to connect it to to make the hot water switch work. Weve had the wiring diagrams...

Hello, No the link is no longer there. I took it out thinking that it was added in and was no longer needed. It was a black wire. Thank you

Hey everyone! I'm hoping someone wont mind helping me with this? Were due to move soon and money is a bit tight, but I want to sort this out for the new owner. We had the old potterton controller, that this one is meant to be a straight swap to. Back in December we had a problem with the central...