Ariston Euro combi SX 20 MFFICE, constant flame failure

[GrahamK]

Hello, and what a great forum, wish I'd found it years ago.
My problem, above boiler, attempts to start, lights, few seconds later goes out, flame failure light on front comes on. When I reset it it starts again. I can hear the sparking and see ignition. The sparking continues after gas has ignited. Flame failure again.
Is this likely to be the electrodes,, flame sensor, or worse still the PCB?
Any advice greatly appreciated.

 

[adamthursby]

I have a similar problem. It stays on permanently after pressing the reset button a few times. But this means we can never set the time for the boiler to come on automatically. If you find the solution, please let me know