Radiators Permantly on

[Motzil]

Hi Guys

I could do with some help here. I have tried search but no found an answer. We have just had a new boiler fitted which is a Vailliant Eco TEC Sustain, along with a Neomitis Thermostat. The tempreture on the theremostate is set to 20C the thermostat is dsiplaying the room tempreture as 23.5C. Therefore the radiators should be turned off. Yet they are on through out the house and its like a sauna. I have turned all the thermostatic valaves off but. it would appear that the boiler is overiding the Thermostat and the heating is permanantly on

Can anyone tell me how to switch this function off especially with todays Gas prices

 

[fowlerboi]

Make sure you leave at least 1 rad fully open in the room the thermostat is in.

If it looks like your thermostat is saying it is hotter than the desired temperature and the boiler is still on, then you likely have it wired wrong or the stat is broken. I've never heard of your stat but a quick google shows 3/5 star rating for it which sounds like a good start (not saying it is the stat that's broken but it certainly doesn't help the fault finding)

Your plumber should come sort that. For now just turn the temperature down on the boiler. I don't know Vaillant's very well but it looks like from the picture it will be the top right button followed by the - until its at its minimum

 

[king of pipes]

Or the control link has been left in the boiler ?

 

[fowlerboi]

Or the control link has been left in the boiler ?

That would be my guess but part of me thinks they surely haven't forgotten or didn't know to take the link out.

 

[Deleted member 120897]

That would be my guess but part of me thinks they surely haven't forgotten or didn't know to take the link out.

Happens more than you think. We had an entire estate where they had been left in. Perhaps it’s sparks as opposed to the plumber?

 

[Motzil]

Or the control link has been left in the boiler ?

King of pipes can you please elaborate

 

[Deleted member 120897]

King of pipes can you please elaborate

Boilers often come with a link inside from the factory, so they can work without any external controls if needed. If the link hasn’t been removed, then the boiler will have a continuous demand, firing up, regardless of what the thermostat (control) is doing.

 

[fowlerboi]

We recon its been wired wrong. Regardless of the fault if its new give the plumber a ring, its not user error something needs to be changed.

 

[king of pipes]

King of pipes can you please elaborate

Check this link has been removed ?

 

[Motzil]

Check this link has been removed ?

Top Man King of Pipes link was still in place. Now removed thanks to your diagram all working Tickety Boo now thank you

 

[king of pipes]

A common problem it's often missed glad you're now sorted . 😉👍