18 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 |
|---|---|---|
| 47-267-66 | E27 PLUS | 2017–present |
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Your boiler is detecting a flame even though the burner should be switched off, which is a safety conflict causing the system to lock out.
Your boiler has become too hot and has shut itself down as a safety precaution to prevent internal damage.
Your boiler is trying to start up but cannot successfully light the gas to produce a flame.
Your boiler's main internal computer is unable to talk to the valve that controls the gas flow, meaning the system cannot light the flame to provide heat or hot water.
Your boiler's main internal computer has developed a serious software or circuit error and can no longer control the heating safely.
Your boiler has shut down because the exhaust gases have become too hot, which is usually caused by a blockage or a build-up of debris inside the system.
Your boiler's internal thermometer that measures outgoing water temperature has developed a fault, meaning the system cannot safely monitor heat levels.
Your boiler has detected an issue with a temperature sensor that monitors the water being sent to your taps or radiators, meaning it cannot heat water accurately.
Your boiler's temperature sensor responsible for monitoring the heat exchanger has stopped working correctly, causing the system to shut down for safety.
Your boiler has detected an issue with the sensor that monitors the temperature of the water being sent to your radiators, causing the system to shut down for safety.
Your boiler has detected a problem with the fan that clears exhaust gases, preventing the system from starting for your safety.
Your boiler has stopped working because the electrical power coming into it is too weak or unstable to run the internal safely.
Your boiler has detected an issue with the electricity supply entering your home, meaning the power quality is not stable enough for the boiler to operate safely.
Your boiler has switched itself off because the water pressure in the system is too low for it to operate safely.
Your boiler is struggling to understand the temperature outside because a sensor has stopped working, which may prevent your heating from reaching the right temperature.
Your boiler has shut down because a sensor has detected it is getting too hot, likely due to a circulation problem or a blockage within the main body of the unit.
Your boiler's internal thermometer for the heating system has stopped working correctly, meaning the unit cannot safely gauge how hot the water is.
Your boiler’s internal computer has developed a serious hardware error and is unable to control the heating process safely.
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BoilerFaultCodes