What the manual says
Manufacturer manualWaiting time still operating (max. 3 minutes)
From this model's manual
Verified against the Ferroli Boiler Optima 1001 installation & service manual.
DIY fix possible
Wait 3 to 5 minutes for the countdown timer to finishCheck that your room thermostat is turned upEnsure there is power to the unit and no other fault lights are flashing
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