24 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 |
|---|---|---|
| 41-116-03 | Ecogenus 24 RFFI System | 2000–2002 |
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 has failed to start because it cannot detect a flame, which is likely due to the gas supply being interrupted or a problem with the ignition system.
Your boiler has failed to light the flame after trying three times, meaning it cannot produce any heat or hot water.
Your boiler has detected that it has become dangerously overheated and has shut itself down to prevent damage.
Your boiler is struggling to stay lit and has failed to maintain a flame multiple times, causing it to lock itself out for safety.
Your boiler has detected that a flame is still burning inside even though it has commanded the gas supply to shut off.
Your boiler has detected a flame signal when it shouldn't be there, which indicates a potential issue with the internal safety sensors or the electrical controls.
Your boiler is failing to register that it has cleared its internal air safely, meaning it is preventing itself from igniting for your protection.
Your boiler is failing to detect that the internal flue fan is starting up, which prevents the unit from firing up to provide heating or hot water.
Your boiler's internal mechanism for clearing waste gases is not working correctly, which forces the boiler to shut down for your safety.
Your boiler's computer is experiencing a communication error or internal glitch, preventing it from operating reliably.
Your boiler has detected an abnormally high temperature inside the system even though it is not currently trying to heat your home or water.
Your boiler has lost the signal from the sensor that monitors the temperature of your hot water, meaning it cannot safely heat the water for your taps.
Your boiler has lost the ability to measure your hot water temperature accurately, which means it will stop heating your taps and shower.
Your boiler has lost the signal from the sensor that monitors the temperature of your floor heating system, so it has shut down as a precaution.
Your boiler has detected that a flame is present even though it has commanded the gas supply to shut off, which indicates a serious safety monitoring fault.
Your boiler has detected that the electricity supply wires are connected in the wrong order, preventing it from starting safely.
Your boiler is struggling to process the electricity supply correctly, likely due to an unstable power frequency reaching its internal controller.
Your boiler has detected an issue with the sensor that confirms the burner is lit, which is preventing it from firing up safely.
Your boiler is struggling to switch between heating your house and heating your hot water, which likely means it will stop providing hot water or central heating.
Your boiler has lost the signal from the sensor that measures how hot the water inside the unit is, so it has shut down as a precaution.
Your boiler is currently unable to read the water temperature accurately, so it has shut down as a precaution to prevent overheating.
Your boiler is struggling to read its own internal water temperature, so it has shut down as a precaution to prevent overheating.
Your boiler's temperature sensor is sending a faulty signal, which prevents the system from accurately measuring how much heat is returning to the unit and stops it from operating.
Your boiler's main computer control panel is experiencing a general communication error, causing the entire system to stop working.
BoilerFaultCodes