Can anyone help me please? - I have a Baxi Combi 105e which is about 6 years old. It has developed a fault where the burner fails to light, although it sounds like it repeatedly attempts to. At the same time, the flu/fan fault red light flashes and, after approximately ten minutes it eventually lights and stays lit, as long as its needed. The fan is working and the breather tubes are clear. Also the gas supply is not at fault. I'm at a loss as to why it takes so long to 'build up the momentum' to light, whether on hot water or central heating.