BoilerFaultCodesIdeal LC Fault Code
The Ideal LC fault code means: your boiler is undergoing a restart process, usually following a fault or power interruption, and is attempting to fire up correctly.. It appears on 15 Ideal models in our database.
Technical description: Turn power off and on
What causes the Ideal LC fault?
This code appears when the boiler's internal computer is performing a software reboot, often triggered after the main power has been switched off and on or following a physical reset. It indicates that the control board is synchronizing its components and checking safety parameters before allowing the burner to ignite. In some cases, it can also appear if there is a momentary fluctuation in the electrical supply to your home.
DIY fix possible
Switch the power to the boiler off at the fused spur switchWait for 30 secondsSwitch the power back on and wait for the boiler to complete its start-up sequence
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Ideal models that show the LC fault code
Click a model for the full fault code list and model-specific repair notes.
- Compact Repair: £0-120
- Compact HE
- Concorde
- Esprit
- Logic Code Combi ESP1 Repair: £100-350
- Logic Combi C24 C30 C35 Repair: £120-350
- Logic Combi ESP1 Repair: £100-£350
- Logic Max & Logic Plus Repair: £120-350
- Logic Max Combi Repair: £100-350
- Logic Max Plus Repair: £120-350
- Logic Max System Repair: £100-350
- Logic+ System Repair: £0-80
- Mexico Repair: £0-80
- Sprint Repair: £0-80
- Vogue
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.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026