boiler clicking on and of every 5mins?
we have a vaillant boiler(approx10yrsold)it has developed what appears to be a very odd problem,it will light and somtimes go out after 5mins if we then run hot water it comes on and is fine,or if it lights and stays on it will come on and of every 5mins or so any help out there please as i am getting desperate
DVK, December 2010
