I have no hot water or heating . Fan and pump running but not going to ignition. I have cleaned the veturi s in the fan and fitted new air pressure switch as instructed by vokera helpline. I can fire up the boiler if the sealed panel is lifted and it stays alight when refitted but will not relight after reaching its temperature.
still an air pressure problem.
check the fan / flue clamp is in place properly, that the sensing tubes are the right way round, and that the flue is not blocked .
