Thermostat control not working

[Doe]

Evening all, first post and I am hoping you knowledgable people will be able to help me. I recently had a new Ideal Logic+ combi installed but the installer connected to the old BG programmer and thermostat. I have since discovered that the heating doesn't go off when the desired temperature is reached. The thermostat clicks off but the boiler keeps heating. I have tried getting the installer back but they are messing me about. An Electrician I called out has referred me to heating engineer.

I have eliminated the stat and the programmer as the problem. I suspect it's the wiring in the boiler. There is one wire with a terminal block which I suspect is the problem. But know idea where it should go before I blow the whole thing

Thanks



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[nortonj]

The black wire in the connector block should go in the terminal next to the other black wire, that is the stat link

 

[nortonj]

But do make sure the two black wires go to your programmer, not sure why he has done that?

 

[Doe]

Thanks nortonj. The wires go to a control box which then routes to the programmer and wall stat.

I thought it might go were you advise but the red wires in the block above to the frost and internal boiler terminal left me unsure.

 

[nortonj]

I would be careful he may of changed some wires in the control box also.

 

[Doe]

Ok.. I think I will wait for the pros to come sort it then.

 

[Doe]

Paid to have it done. Although i got shafted by the heating engineer. It was a simple switch of the black stat wire in the control box to the room stat terminal. But they then proceed to pull a fast one that my room stat was faulty and sold me one i don't need since i already had a smart stat going on the wall. With their fountain of knowledge, they claim the Tado start is 12v and will blow if i connect it without rewiring.

I have since taken off the thermostat fitted and fitted the Tado smart with no issue as it does accept 230v.

Thanks for the help and advise.