Fan LED light coming on, no hot water or CH, sometimes lights up then goes off again, the last two days have been great, it has been working on it's own! I have had three different plumbers look at it and all say different problems , PCB board, Temp. switch and now heat exchanger blocked up! by the way the boiler is only 18 months old!

PlumbDiv, July 2006

Sounds like a fault on the fan or the air pressure switch

Dave Smith 4861, March 2009

Sounds like a fault on the fan or the air pressure switch

Dave Smith 4861, March 2009

I am having the same problems and mine is only 15 months old. I have been told it is probably the pressure switch, the person telling me is a gas fitter and also a relation. I am going to replace it and see. Have you had any success yet?

Tom, August 2006