I had the groaning vibration problem when the boiler was on 'low fire' i.e. when the heating is up to temp and the burner has a small flame to keep it topped up. It would also happen if the boiler was re-started and the start up cycle with the trap filling sequence (which is also accompanied...
I had the groaning vibration problem when the boiler was on 'low fire' i.e. when the heating is up to temp and the burner has a small flame to keep it topped up. It would also happen if the boiler was re-started and the start up cycle with the trap filling sequence (which is also accompanied...
