Had a blockage in the down pipe that the boiler condensate water feeds in to (now sorted), heavy rain sent water back up the condensate pipe into the boiler and out onto the floor.The boiler won't fire up anymore the fan runs but no ignition and then slow flashing of the blue light.Initially the blue light was flashing rapidly and no fan but having left it for a couple of days flashes slowly now but no ignition.Is it dead....