In need of help. I have a Chaffoteaux Britony boiler which is driving me mad. British gas engineers have visited the house 9 times over the last 8 months and are unable to repair. They keep telling me this make is rubbish and try to sell me a new boiler. The problem is, on the control panel it keeps requiring a reset, about every 15 minutes. The 80+ degree light flashes and the burner light keeps coming on for a second or two, there is a clunk and the burner light goes out again. It appears that the machine thinks the water is near to boiling and preventing the burner from lighting. The water is in fact cold. Any ideas??? I dont want to buy a new boiler (British gas talking £4000) if the problem is not terminal.