Central heating thermostat

[Alan Stirrup]

Does that mean everything works now?

It seems to be, Brian, however there may be an issue with the three port valve we discussed earlier. I placed this to water and heating manually and haven't tested by flicking over to water only yet. I'm not to worried about that though as I can wait for the warmer weather and get it converted to a two port as suggested.

I think the only thing that remains is where I connect the blue neutral wire in the junction box so that I can change the thermostat?

 

[brianmoooore]

So now we have power in the stat wire, I've no idea why, all I did was open the connections on that block, push them in further and tightened them up.

The wire could have been tightened down on the insulation, instead of bare copper. It might be still on the insulation, but the screw has now cut through it.
Blue wire needs to go to neutral, which timhoward has identified in post #33.
Congratulations on a successful fault finding.

 

[Alan Stirrup]

The wire could have been tightened down on the insulation, instead of bare copper. It might be still on the insulation, but the screw has now cut through it.
Blue wire needs to go to neutral, which timhoward has identified in post #33.
Congratulations on a successful fault finding.

Thanks very much Brian and to everybody else who has contributed to helping me resolve this issue you gents are fantastic and really generous the way you give up your spare time to help numpties like me. Have a happy and safe new year all of you and thanks again.