BoilerFaultCodesIdeal LC Fault Code
The Ideal LC fault code means: 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.. It appears on 20 Ideal models in our database.
Technical description: 5 restarts within 15 minutes
What causes the Ideal LC fault?
This fault occurs when the boiler's internal computer detects that the flame has gone out or failed to light properly five times in quick succession. It is usually caused by a problem with the gas supply reaching the burner or a worn-out ignition component that can no longer create a reliable spark. To prevent a build-up of unburnt gas, the boiler permanently shuts down until the underlying mechanical issue is fixed.
This fault can be more frequent during extreme cold snaps if a partially frozen condensate pipe causes the flame to 'choke' and go out repeatedly.
DIY fix possible
Check if other gas appliances in your home, like a hob, are working to ensure gas is reaching the propertyCheck if your gas meter has creditPress the 'Reset' button and wait for the boiler to restart
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A cover plan would handle faults like LC: no call-out fees, no surprise bills.
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Ideal models that show the LC fault code
Click a model for the full fault code list and model-specific repair notes.
- CLASSIC2 Repair: £90-250
- ESPRIT ECO2 Repair: £150-300
- EXCLUSIVE2 Repair: £150-350
- GB24 / GB30 Repair: £120-250
- i Combi 2 Repair: £120-350
- i-mini C24 / C30 Repair: £90-250
- INDEPENDENT + COMBI Repair: £90-250
- Independent C24 Repair: £100-£250
- INDEPENDENT SYSTEM Repair: £100-£250
- Independent System S15 Repair: £100-£250
- INSTINCT2 Repair: £100-£250
- Instinct2 24
- Logic Code Combi ESP1 Repair: £100-350
- Logic Combi C24 C30 C35 Repair: £120-350
- Logic Combi ESP1 Repair: £100-£350
- LOGIC HEAT Repair: £100-350
- Logic Max Heat Repair: £90-250
- Logic Max System Repair: £100-350
- LOGIC SYSTEM Repair: £100-350
- Logic+ Heat H Repair: £0-120
Source
Ideal LC fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
- Ideal GB24 / GB30 manual (PDF)
- Ideal Independent System S15 manual (PDF)
- Ideal Instinct2 24 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026