Posted by David Westwell on November 07, 2001 at 06:35:42:
I have a Vaillant Combi which is approx 6-7 yrs old. When a hot tap or the heating system turns on, the flames start up, quivers, and then the flame failure device kicks in with the associated light. Anybody know what causes this as I currently have no heating or hot water from the combi.