Should Ideal Logic Combi ESP1 35 show demand for heat when thermostat esrpt4 doesn't need it?

[Tim Baker]

Hi all,

I've just moved in to a new build with the above boiler and two thermostats (one upstairs, one downstairs). The other day we had an issue where the heating upstairs stayed on no matter what the thermostat said, I managed to factory reset the upstairs thermostat and since then the rads only come on when required.

I've noticed since then (and think it was probably also the case before) that the boiler is showing demand for heat all the time, it displays the radiator symbol and is always whirring. I would have thought that if the thermostats didn't demand any heat then the boiler wouldn't be active in this way and would go into standby mode?

Do any of you guys know if this is normal or if I need to get on to the installers to get them to fix it? I don't really want a massive gas bill because the boiler has been constantly on since we moved in! I have turned the boiler to water only for now as it's not too cold outside so would appreciate any help you can offer!

Thanks,

Tim

 

[Scott_D]

Can you post a picture?
Are any pipes under the boiler hot?

 

[Tim Baker]

Can you post a picture?
Are any pipes under the boiler hot?

Hi, thanks for your response.

Here are the pics.

The pipe I am pointing to is hot

 

[Scott_D]

Any radiators getting hot?
Are the zone valves accessible in an airing cupboard maybe?

Sounds like it might not be wired correctly and calling for heat but nowhere fit it to go

 

[ShaunCorbs]

on the boiler the rad knob turn it all the way (max) does the boiler fire?

 

[Tim Baker]

The radiators get hot when required so I think there is a connection but surely the boiler should go I to standby when not needed by the thermostats?

I've just turned the radiator knob to max and the boiler fires ok

 

[ShaunCorbs]

yep something been wired wrong and its keeping the bypass warm waste of gas needs sorting

is the time clock calling for heat eg still on program ?

 

[Scott_D]

Best to get the installer/builder back to take a look

 

[Tim Baker]

Thanks both, big help!

Will give them a call Monday