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Evolution at work! Survival of those that can operate a thermostat pneumonia for the rest. Go to the manufacturers website of your thermostat and download the instructions in your language. Then apply the information you have gleaned.

Did I read you got your boiler on the internet? Who might I ask fitted it for you?

I hope you are not a Troll and infact do require assistance in operating your thermostat and boiler!
 
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So I turned on Manual and then turn the knob to Water + Rad and it worked the flame came on and radiators came on, but then i turned it off and then tried turning it back on the blue light didn't come back on.
 
I am a strong believer in, don't touch anything you don't understand,
so please turn it off and either read the manuals or get an engineer in to explain.
 

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