38 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
The fault code is already on your display
Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →
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 |
|---|---|---|
| 47-019-52 | BETACOM 4 24c-A (H-GB) | 2017–present |
| 47-019-53 | BETACOM 4 30c-A (H-GB) | 2017–present |
Tap any card for details
Your boiler has stopped working because it is unable to accurately measure the temperature of the water moving through it.
Your boiler is struggling to accurately detect 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 it due to an electrical connection issue.
Your boiler has stopped working because it is unable to accurately read the temperature of the water returning to it from your radiators.
Your boiler is struggling to accurately detect the temperature of the water being heated for your taps, causing it to shut down for safety.
Your boiler has automatically turned itself off because it has detected that its internal water temperature has become dangerously high.
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Your boiler has detected that the water inside is heating up too irregularly, so it has safely shut itself down to prevent any internal damage.
Your boiler has sensed that the water inside it is heating up much too quickly, so it has purposefully shut down to prevent damage to the system.
Your boiler has detected that the exhaust gases are becoming dangerously hot and has automatically switched itself off to prevent overheating.
Your boiler has detected an issue with its internal flame sensor and has safely shut down to prevent gas from flowing without a flame present.
Your boiler is trying to start up but cannot successfully light the gas flame required to heat your home.
Your boiler is failing to stay lit, which means it has safely shut itself down because the burner flame keeps going out.
Your boiler has detected that the internal fan is not spinning at the correct speed to vent exhaust gases safely, so it has stopped working as a precaution.
Your boiler's internal communication system is struggling to transmit signals because it is not receiving enough electrical power.
Your boiler is struggling to control the flow of gas, which is preventing it from lighting safely.
Your boiler has detected that the gas valve is not closing correctly when it should, which triggers a safety shutdown to prevent gas from flowing uncontrollably.
Your boiler has detected a failure in its internal memory, which prevents it from correctly reading or writing the settings needed to operate safely.
Your boiler's computer is struggling to read internal signals correctly, which is preventing it from operating safely.
Your boiler's internal computer is overheating, causing the system to shut down to prevent damage to its sensitive electronic parts.
Your boiler's computer is struggling to read the flame sensor correctly, which is preventing it from lighting safely.
Your boiler is struggling to keep a steady flame, causing it to shut down for safety reasons.
Your boiler's computer has lost its identity settings and no longer knows which specific model it is, which prevents it from operating correctly.
Your boiler is struggling to accurately measure how hot the water is as it moves around your heating system, so it has shut down to prevent potential damage.
Your boiler is struggling to compare the temperature of the water returning to it with the pressure readings, causing it to shut down for safety.
Your boiler is unable to read the water pressure level inside the system due to a faulty or disconnected sensor, which is preventing it from heating your home safely.
Your boiler is having trouble communicating with its internal water pressure sensor, which is preventing it from safely heating your home.
Your boiler is struggling to detect the water pressure inside the system because the sensor is not sending a clear signal, which prevents the heating from turning on.
Your boiler has detected a blockage in the drainage pipe that removes waste water or a potential issue with the exhaust system.
Your boiler has lost the signal from the sensor that monitors your hot water temperature, which may stop it from heating your water correctly.
Your boiler has detected that there is not enough water circulating inside the system to operate safely, so it has shut itself down to prevent damage.
Your boiler is having trouble measuring the temperature of the water inside the system, so it has safely shut down to prevent overheating.
Your boiler has detected that a temperature reading from its internal system is inconsistent or missing, so it has safely shut itself down to prevent potential damage.
Your boiler has detected an issue with the separate switch or external sensor that controls your underfloor heating system, preventing that specific heating zone from working correctly.
Your boiler is failing to ignite because it cannot detect the spark needed to start the flame.
Your boiler is unable to safely control the flow of gas necessary to ignite the flame, meaning it cannot produce heat or hot water.
Your boiler has detected that the internal mechanism responsible for moving water around your heating system is not working correctly, which means it cannot provide heat or hot water.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
Not faults — these are normal operating states. Tap to expand.
Monthly cover means no unexpected bills when your boiler breaks down.
Affiliate links. We may earn a commission at no extra cost to you.
BoilerFaultCodes