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Mend Ariston Microcombi 23MFFI Boiler Heating

How to fix my ariston boiler?

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
AristonAriston Microcombi 23MFFIHeating, Home Heating SystemsBoiler Heating Ariston
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

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Ariston Microcombi 23MFFI Not Working - Fixes