I seem to have a problem with my Oil Burner. I switched the oil on the other day, after awhile i could hear like a crackling noise in the ceiling. Eventually the oil heating went off and the Oil Burner went off. When i tried to switch it back on, it wouldnt light.
Go out to burner and see if there is a red light on front of box - when heating switched on it press it again.
Very possible that you (or someone) may have turned some valves during the summer (those red ones) and water cannot circulate - locating this is not a straightforward job. You may find that your boiler has locked out due to overheating - locating this is not a straightforward job for the inexperienced.
Is there is gauge which tells you the pressure of the system - what does it read?