41 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-019-38 | Energy2 30c -A (P-GB) | 2018–present |
Appliance names and production years are taken from the UK Product Characteristics Database (the SAP/SEDBUK register). Where a GC number is also printed in this model's own manufacturer manual, both sources were checked to agree.
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Your boiler is unable to measure the temperature of the water inside it, so it has safely shut down to prevent overheating.
Your boiler is struggling to accurately measure the temperature of the water returning to it, so it has stopped working to prevent potential overheating.
Your boiler has stopped working because it is unable to accurately measure the temperature of the water flowing through the system due to a faulty electrical connection or sensor.
Your boiler has stopped working because it is unable to accurately read the temperature of the water returning to it, causing it to shut down for safety.
Your boiler is struggling to detect the temperature of your hot water cylinder because of a faulty connection or wiring issue.
Your boiler has lost the connection to the temperature sensor in your hot water cylinder, meaning it no longer knows how hot the water currently is.
Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage.
Your boiler has detected that the water pressure inside the system has dropped too low to operate safely.
Your boiler has detected that the water temperature is changing too drastically between different internal sensors, likely due to a flow issue, so it has safely turned itself off.
Your boiler has detected that the water inside it is heating up much faster than it should, so it has turned itself off as a safety precaution.
Your boiler has detected that the exhaust gases are becoming far too hot and has automatically switched itself off to prevent damage or dangerous overheating.
Your boiler has detected an issue with its flame monitoring system and has safely shut down to prevent gas from flowing without a confirmed flame.
Your boiler is failing to light the fuel inside, meaning it cannot produce heat or hot water because it hasn't detected a flame.
Your boiler is trying to start but the flame keeps going out, meaning it cannot produce heat or hot water.
Your boiler has detected that the internal fan responsible for clearing exhaust gases is not spinning at the correct speed to operate safely.
Your boiler's internal communication system is struggling to transmit data because the electrical signal between its components is too weak.
Your boiler has detected an issue with the component that manages the flow of gas, causing it to shut down for safety reasons.
Your boiler has detected an issue with the valve that controls the gas supply, causing it to shut down for safety reasons.
Your boiler's internal computer is experiencing a memory error, meaning it has lost its settings and cannot safely manage the heating process.
Your boiler has detected an internal electrical or sensor problem and has safely shut down to prevent damage.
Your boiler's computer system is getting too hot and has automatically shut down to prevent permanent damage.
Your boiler has detected an internal error with its computer chip that processes the flame safety signal, which means it has safely shut down to prevent unsafe operation.
Your boiler is locking out because the flame is unstable or failing to stay lit properly.
Your boiler has lost its identity settings, usually because a part was recently replaced and not correctly programmed to match your specific model.
Your boiler is confused because it is getting incorrect information about how hot the water is inside the system, so it has stopped working as a safety precaution.
Your boiler has detected that the water temperature is behaving unexpectedly, suggesting that its internal heat sensors are likely providing conflicting or inaccurate information.
Your boiler's internal sensor that measures water pressure is malfunctioning or disconnected, preventing the system from knowing if it is safe to fire up.
Your boiler has detected an electrical fault with its internal water pressure sensor.
Your boiler has noticed that the water pressure sensor is not detecting the expected pressure spike when the pump starts up.
Your boiler has detected a safety disagreement between its internal temperature protection device and the gas control system, so it has safely shut down to prevent any risk.
Your boiler has detected an issue with the drainage of exhaust gases or water, meaning it has shut down to prevent the release of harmful fumes into your home.
Your boiler has lost its hot water temperature reading because an optional external control or link connection is not set up correctly.
Your boiler is failing to detect a rise in water temperature when the flame ignites, which usually means there is air trapped inside or not enough water circulating through the system.
Your boiler has detected a mix-up or incorrect reading between its internal temperature sensors, which usually means they were installed backwards or have come loose during maintenance.
Your boiler has detected that its internal temperature sensors are either disconnected or have been accidentally moved to the wrong pipes during installation or maintenance work.
Your boiler has detected that the connection to your underfloor heating system is interrupted or a safety sensor is not reporting correctly, so it has stopped providing heat to prevent damage.
Your boiler is failing to detect the internal spark needed to ignite the flame, meaning it cannot start up to provide heat or hot water.
Your boiler has lost its connection to the component that controls the gas supply, meaning it cannot safely ignite to provide heating or hot water.
Your boiler has detected an issue with the water pump, meaning it is either unplugged, wired incorrectly, or has a damaged cable.
Your boiler is struggling to detect the temperature of your hot water cylinder because there is an electrical connection issue with the sensor.
Your boiler's internal computer has failed its own safety check and can no longer control the heating system, meaning the unit will not operate.
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BoilerFaultCodes