My boiler bangs on and off on startup and continues to do it when running. The rads get hot and the hot water works ok. Ive tried changing the fuse on the Ignition control board.
ravenheat CSI85T
GCN 47-581-19
"bangs on & off"?
are we talking about explosive ignition during initial startup?
or are we talking about a regular banging noise during burn?