when i switch it on it runs fine for abou t half an hour then stops and error led fan or flue failure, i have checked both and they seem fine also the air pressure switch seems to work also if i leave it off for awile and put it back on it then runs, could anyone help me with this problem thanks

mark, April 2007

You need to a pressure differential metre and properly check the pressure switch, because that is where your problem lies.

Derrick Martin, April 2007