What the manual says
Manufacturer manualTry resetting the boiler
From this model's manual
Verified against the Ariston Micro Condens System installation & service manual, page 27.
DIY fix possible
Locate the reset button on the boiler control panelPress and hold the button for 3 to 5 secondsWait up to two minutes for the boiler to restart and check if the error code clears
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