Thanks for reply. We have had 3 different people look at boiler but it is still doing same problem and nobody seem to know cause, hence this post. I took a video of the lights last November and have posted still images from this for you to see. The boiler manual says it is a faulty air pressure...
We have a Biasi Garda HE M96.28SM/B. it doesn't always ignite first time when the hot water tap/shower is turned on. When it does ignite, the water is hot but after a minute or so the flame is extinguished so the water runs cold and the 3 lights on the boiler are as follows: the green light on...