Boiler kicking in to soon

[terryplumb]

Go turn off the boiler manually ,when target temp is satisfied at 20 degrees.Then time how long the stat stays at that temp before it starts to drop ,and report back.

Your last post indicated that when boiler is switched off manually ,thermometers stayed at 20 degrees for several hours , does the thermostat stay at 20 as well ?

 

[Mottie]

Winston I, have said numerous times that if I turn the boiler of completely the temprature remains steady for a long time. Maybe 7 hours on three thermometers.

Set it to go off 7 hours before you go to bed then.

 

[fitzykev]

Even if it is turned of at night. It's still going to come on tho during the day when it's sitting at 20 degrees. Yes the thermostat is staying at 20.

 

[Newboy]

Are you sure that the '20' you're seeing on the thermostat isn't the target temperature rather than the actual air temperature?

 

[terryplumb]

Your either looking at the wrong display ,or the stat is kaput .
Or the boiler is getting a demand from elsewhere ,can't be bothered to re read all your posts ,is it a combi boiler ?

 

[fitzykev]

No it's not the target temp it's the temp of the house.

 

[Newboy]

OK - thanks for clarifying.

DO you have an external temperature probe and, if so, what does the external temperature show?

Edit: is there an external probe connected to the system/thermostat?

 

[fitzykev]

No there is no external probe

 

[Newboy]

Well that's the two obvious possibilities eliminated!

If you set the target temperature at 18C how long before the boiler fires up?

 

[fitzykev]

It would keep firing up every so often even if it's at 18 degrees what ever temp I set it at once it reaches that temp it stays steady for hours. Even if I turn boiler off. So there for when on, it does not need to fire up all the time but it does.

 

[dilalio]

How long has this been happening?
Is it a new house for you? A new installation?
What has made you notice this only recently?

 

[Mottie]

This thread is like a game of 20 questions. We've only got two more to go and if we dont get it by then, fitzykev wins!

 

[muggles]

It's this make https://www.cityplumbing.co.uk/Glow...=a5d5b07d719c667bbab077c4753c7d8e&fo_s=gplauk

Your link is broken, can you try again?

 

[fitzykev]

https://www.glow-worm.co.uk/homeowner/products/climapro-rf-control-1477.html

 

[muggles]

Ok, so there's no hysteresis adjustment or anti-cycling feature on that, which is a bit rubbish. Is the Modulating Control set to on or off? Is the outdoor sensor function definitely disabled?