Thanks for the detailed reply oilhead, I had read previously about the balanced flue aspect and this makes total sense, I am guessing some of the flue gas is being sucked back into the intake and causing it to cut out due to lack of o2? Would there be physical evidence as the where the leak was...
First post so hopefully I give all the info needed.
We have a strange annoying niggle with our oil boiler that I hope someone might be able to point me in the right direction to resolve.
The issue is that the boiler goes into lockout requiring the red button on the burner to be pressed to...