BoilerFaultCodes.com

Ideal Independent C24 Fault Codes

Combi Natural Gas 24 kW 2012-present
GC Number: 47-348-70

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Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

C0
Your boiler's main control chip has lost communication with the circuit board, essentially meaning the brain and body are no longer speaking to each other.
Gas Safe engineer required · £100-£350
C2
Your boiler has lost communication with its internal computer chip, meaning the main control board no longer recognizes the specific model it is supposed to be operating.
Gas Safe engineer required · £100-£350
F1
Your boiler has detected that the water pressure is too low to operate safely, which is usually caused by a small leak or after bleeding your radiators.
May be DIY safe · £0-120

All 20 fault codes

Code Severity Plain English
0 Low Your boiler is working perfectly and is currently sitting on standby because your heating and hot water are already at the desired temperature.
C Low Your boiler is working normally and is currently heating your radiators.
C0 High Your boiler's main control chip has lost communication with the circuit board, essentially meaning the brain and body are no longer speaking to each other.
C2 High Your boiler has lost communication with its internal computer chip, meaning the main control board no longer recognizes the specific model it is supposed to be operating.
D Low Your boiler is working normally and simply indicating that you are currently running a hot water tap or shower.
F Low Your boiler is not broken; it has simply noticed the cold weather and is running automatically to prevent the internal pipes from freezing.
F1 High Your boiler has detected that the water pressure is too low to operate safely, which is usually caused by a small leak or after bleeding your radiators.
F2 High Your boiler has started to light but the flame has gone out unexpectedly, meaning the system has shut down for safety.
F3 High Your boiler's fan has failed or is not spinning correctly, which means the appliance cannot safely clear exhaust fumes and has shut down as a result.
F4 High Your boiler has detected an issue with the sensor that monitors the temperature of the water leaving the unit, causing it to shut down as a safety precaution.
F5 High Your boiler has detected a problem with the sensor that monitors the water temperature returning from your radiators, causing the system to stop working for safety.
F6 Low Your boiler has lost communication with its outdoor temperature sensor, meaning it can't tell how hard it needs to work based on the weather.
F7 High Your boiler is not receiving enough electrical power from the property's mains supply to operate safely.
F9 High Your boiler's internal computer brain hasn't been programmed correctly or has lost its memory, so it doesn't know how to operate your specific heating system.
L1 High Your boiler is struggling to light the gas to start the heating process, often due to a lack of gas supply or a temporary ignition glitch.
L2 High Your boiler has stopped working because it cannot keep the flame lit, which means it will no longer provide heating or hot water until reset or repaired.
L5 High Your boiler has stopped working because it has been reset too many times in a short period, likely triggered by an underlying recurring fault.
L6 High Your boiler thinks a flame is present when it shouldn't be, which is a safety error that has caused the system to shut down for protection.
L9 High Your boiler's internal computer has encountered a software glitch or a communication error that is preventing it from running properly.
P Low Your boiler is in preheat mode, which is a normal setting that keeps a small amount of water warm so it reaches your taps faster.

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