My ariston (microcombi 23mffi) boiler simply has ceased working. The fan comes on but no burner, this only occurs when the c/h is calling for heat. When I run the tap I get nothing. Seems like a mystery as it worked fine earlier. Possibly the PCB?? Any ideas??

D Burton, January 2008

Generic boiler ignition sequence goes something like this : power on -> pump runs -> flow switch operates -> fan runs -> air pressure switch operates -> boiler goes to ignition. If fan is running but but boiler does not go to ignition, then I would start with the air pressure switch. You would need a fully EXPERIENCED Corgi registered engineer to test this component. It could well be the PCB which is causing this problem, but it is most likely to be the A.P.S. Hope this of some help.

Curtis Lee Patrick, February 2008

I have a very similar problem with my ariston combi today. Did you get your problem resolved?

B Betts, January 2008

I have a very similar problem with my ariston combi today. Did you get your problem resolved?

B Betts, January 2008