BoilerFaultCodesTechnical description
Flow target temperature from external analogue regulator terminal
What causes this fault?
This is not actually a fault, but an information message triggered when an external smart thermostat or plug-in controller takes over the boiler's temperature settings. It occurs when your external controls send a specific voltage signal to the boiler, telling it to override the manual dials and heat to a precise target. If your heating isn't working while this is displayed, the issue usually lies with a setting on your room thermostat or a communication error between the two devices.
DIY fix possible
Check if your external room thermostat or smart home hub is set to a very low temperatureEnsure your external controls have power and are connected to your Wi-Fi if applicableIncrease the temperature setting on your external thermostat to see if the boiler fires up