Your boiler has temporarily paused operation to prevent overheating and should restart automatically once the internal sensor detects a safe temperature.

DIY fix possible

Monitor the boiler for a few minutes as it should restart automaticallyCheck that at least one radiator or bypass valve is open to allow heat dissipationIf the code persists, ensure the system pressure is between 1 and 1.5 barPress the reset button if the boiler enters a full lockout mode