Oil ran out,had some delivered last week,tank now half full but burner won't light.Pipework from tank in garden comes straight up vertical through kitchen floor,then a straight section,then pipework goes into boiler housing and up,round and connects into pump of burner.I think oil stuck just outside house - is this the same as an airlock?Burner is Riello RDB1.I've undone small allen screw on side of pump but no oil or bubbling.Have also disconnected flexible supply pipe from pump and put it in bowl but no oil came out.Have not tried black nut with rivet sticking out the middle and have not tried long brass hexagon-shaped part 3 inches long with allen screw on the end as I think these are both something to do with the oil pressure and initial settings of boiler.Please does anyone know what I should do?I can mend most things but this is defeating me! Thanks, Emma

Emma, January 2009

open up the top of your burner on the left hand side you will see a long sort of nut which is gold at the top you will see a hole for an alan key to fit into the top turn it and the oil should spray from it when the oil is flowing turn offf and this is it blead

martin callaghan, March 2009