BoilerFaultCodes.com

Ideal Logic Max & Logic Plus Fault Codes

Regular Natural GasLPG 12-30 kW 2018-present
GC Numbers: 41-750-7041-750-7141-750-7241-750-7341-750-7441-750-8441-750-8541-750-8641-750-8741-750-88

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Most common fault codes

F2, FN or LN
Your boiler has lit correctly but the flame has gone out unexpectedly, meaning the system has shut down for safety.
May be DIY safe · £100-350
F3
Your boiler has detected an issue with the fan that safely clears exhaust gases, preventing it from starting up for your safety.
Gas Safe engineer required · £250-£450
F4
Your boiler has sensed a problem with its internal temperature sensors or a lack of water movement, causing it to shut down for safety.
Gas Safe engineer required · £100-£220

All 19 fault codes

Code Severity Plain English
F2, FN or LN High Your boiler has lit correctly but the flame has gone out unexpectedly, meaning the system has shut down for safety.
F3 High Your boiler has detected an issue with the fan that safely clears exhaust gases, preventing it from starting up for your safety.
F4 High Your boiler has sensed a problem with its internal temperature sensors or a lack of water movement, causing it to shut down for safety.
F5 High Your boiler has detected a sensor problem that means it cannot accurately measure the temperature of the water returning to the unit, causing it to shut down for safety.
F6 Low Your boiler is having trouble reading the outdoor temperature, which it uses to help run your heating more efficiently.
F7 High Your boiler is not receiving enough electrical power from the grid to operate safely and has shut down as a precaution.
F8 High Your boiler's internal computer has lost its settings or suffered a technical failure and can no longer control the heating system.
F9 High Your boiler's internal computer has lost its settings or suffered a technical failure and can no longer control the heating system.
FA High Your boiler has detected that the water is flowing in the wrong direction through the pipes or that the temperature sensors have been installed on the wrong pipes.
FD High Your boiler has stopped heating because water is not moving through the system properly.
FU High Your boiler has detected that water is heating up too quickly or not circulating properly, which usually means something is blocking the flow of water through the system.
L1 High Your boiler has shut down because it thinks the water inside is getting too hot or is not moving through the system properly.
L2 High Your boiler has failed to light several times and has shut down for safety, meaning you currently have no heating or hot water.
L4 High Your boiler has sensed a problem with its internal temperature sensors or a lack of water movement, causing it to shut down for safety.
L5 High Your boiler has detected a sensor problem that means it cannot accurately measure the temperature of the water returning to the unit, causing it to shut down for safety.
L6 High Your boiler thinks a flame is burning even though it shouldn't be, causing the system to shut down for safety.
L8 High Your boiler's internal computer has lost its settings or suffered a technical failure and can no longer control the heating system.
L9 High Your boiler's internal computer has lost its settings or suffered a technical failure and can no longer control the heating system.
LC High Your boiler has tried to start five times in a row but failed to keep the flame alight, causing it to shut down as a safety precaution.

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