Why is my worchester boss firing when 2 degrees above set temp?

Joined
13 Apr 2011
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Location
Antrim
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United Kingdom
Why would my worchester bosch be firing up when it has been sitting 2 degrees above set temp? Its been firing every 10 or 20 mins for around 20 seconds then off again but in this photo it has been on a good 20 mins on now. I have the easycontrol ct 200 thermostat.
 

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I’m wondering if a link has been left in at the boiler? If not maybe contact your installer?
 
What do you mean a link left in?
Most Boilers come with a factory fitted link so the heating can be used without a control (eg a thermostat), sometimes these aren’t removed by installers, so the boiler constantly tried to fire when not being requested for by a control.
 
Most Boilers come with a factory fitted link so the heating can be used without a control (eg a thermostat), sometimes these aren’t removed by installers, so the boiler constantly tried to fire when not being requested for by a control.
Something i can check myself as long as i dont touch it?
 
i would politely suggest that people stop commenting/assisting this poster and let them deal directly with the installer, who should address the issues that are apparently occuring.....from install in the past couple of weeks...or is their something else.....

 
i would politely suggest that people stop commenting/assisting this poster and let them deal directly with the installer, who should address the issues that are apparently occuring.....from install in the past couple of weeks...or is their something else.....

I am finding out more on here from others. At least on here i am getting more ideas and i like learning so of you could please ignore my posts and let people who want to help. That would be good.
 
I found this on worchester bosch website

Do I remove the link wire in the boiler when fitting a Worcester control?​

No, when using Worcester controls the link wire stays in place.

The link is to be removed when only using third party controls.
Not sure then, could be to do with weather compensation but I have no knowledge in this area, sorry.
 
Not sure then, could be to do with weather compensation but I have no knowledge in this area, sorry.
Juat as you mention that i had just noticed something. The outdoor temp you can see in this photo is wrong. It was around 15 degrees outside at thst time
 

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the outside temp showing on the control was fine all day but on the graph it does not look right at all

The outdoor sensor should be mounted in a position which is in constant shade, well away from any heat sources. If that's correct, then all that is left is an error in calibration, I seem to remember my sensor has an adjustment for the calibration somewhere in the settings.
 
The outdoor sensor should be mounted in a position which is in constant shade, well away from any heat sources. If that's correct, then all that is left is an error in calibration, I seem to remember my sensor has an adjustment for the calibration somewhere in the settings.
My thermostat is taking the outside temp from the internet
 

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