Hi , do you have permanent ventilation to outside air?
Ok . did the boiler reset?
Ok, have you checked the flue for blockages
No probs , I'm in this evening
Ok . the flue can affect combustion. If there is strong winds and a downdraft . also for the dfluecto be fully effective it has to be hot to achieve a good pull through. It may be best to have the boiler running continuously on minimum during cold weather. How old is the installation?
Is there a down draft diverter on the flue just above the boiler ?
Ok. I wonder if the flue was installed well enough . frolling themseles may have a uk rep who would come and check. In the meantime I would try to light it when the wind and try to get the flue hot enough
Sorry , meant when the wind is light
How long is the flue? Also are you using the fuel recommended. Sure you care but just double checking
Your welcome . all the best