Bob changed the nozzle and oil filter and put his gauge on the oil burner to see what the oil pressure was while running. He got his combustion analysis kit out to check the combustion and the flue ...

BURNER IS OPERATIONAL BUT WON’T FIRE Possible causes: Again the furnace may lack fuel or there may be a problem with oil delivery, remarked Markarian. There could be a plugged nozzle, filter, or oil ...