BoilerFaultCodesIdeal LC Fault Code
The Ideal LC fault code means: your boiler has shut itself down as a safety precaution because it has been manually restarted too many times within a short period.. It appears on 10 Ideal models in our database.
Technical description: 5 Boiler Resets in 15 minutes
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.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like LC: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Ideal models that show the LC fault code
Click a model for the full fault code list and model-specific repair notes.
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 7 July 2026