Search results

To recap. F27 (incorrect sensing of flames) issue showing on the screen. Changed fuse. Boiler turns unresponsive. S.0 (Heating issue, no heat demand) when i press 'I' screen showing different pressure reading than analogue meter (analogue shows high pressure) - im not sure when this happened.

'Engineer' came and he was useless. I had to direct him towards looking at the board, he agreed that that was the issue and that he needed £200 to replace it (he charged me £120 for the visit). I asked him if he could check individual components of the board to see which was faulty and said he...

Hi JohnD thank you for responding. No I did not - I do not know whether it blew or not. I only have a screwdriver as a tool. From what I saw on the internet the cause of f27 is probably a faulty igniter or a component of the board. Having no way to check whether the components were working i...

Hello, My Vailliant boiler was showing F.27 (incorrect sensing of flames). I opened the panel and replaced the 2A fuse. After that the boiler stopped responding. Status code now is S.O (Heating issue, no heat demand). Does not respond to opening hot water tap or turning on the radiator...