I've had trouble with the probe on mine, getting covered in carbon (she might need to be mapped baz). Remove the cover there's a black cable onto a probe which pulls straight out. Clean her off with a drop of whiskey an the burner should fire as normal.
[quote author=Anto J link=topic=40167.msg457465#msg457465 date=1388253172]
I've had trouble with the probe on mine, getting covered in carbon (she might need to be mapped baz). Remove the cover there's a black cable onto a probe which pulls straight out. Clean her off with a drop of whiskey an the burner should fire as normal.
[/quote]
If the photo cell is acting up they usually wont stay lit. Black smoke is unburnt fuel.