While you wait for answers, we may have found some information which could help you.
Click here for Boiler Oil ButtonRiello mectron 3m oil burner leak?
Biasi sg3 Riello 40 burner constantly firing?
my riello oil burner just makes abuzzing sound?
how can i bleed my riello 40 oil burner?
My riello boiler won't start after replacing the water pump?
Riello Burner Motor Sound?