BoilerFaultCodesYour boiler is currently protecting itself from freezing temperatures by briefly running its internal components to prevent water inside the system from icing up.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Antifrost mode on (burner and pump in operation).
DIY fix possible
Check if this is happening during very cold weather, as this is a normal automatic safety feature.Ensure your boiler thermostat or external room thermostat is not set too low, which might be triggering the frost protection cycle unnecessarily.Wait for the temperature to rise, as the boiler will stop this cycle automatically once the internal sensor detects it is no longer at risk of freezing.
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