BoilerFaultCodesIdeal Lack of burner ignition Fault Code
Also written as LACKOFBURNERIGNITION — same fault.
The Ideal Lack of burner ignition fault code means: your boiler is trying to start up but cannot light the gas to create a flame, meaning you will have no heating or hot water.. It appears on 6 Ideal models in our database.
Technical description: Flashing lamp, alone or simultaneously with another lamp (no ignition signal from the full sequence ignition device).
What causes the Ideal Lack of burner ignition fault?
This fault occurs when the boiler's control system attempts to light the burner but fails to detect a stable flame after several attempts. The most common reasons are a lack of gas reaching the unit, worn-out spark electrodes that can no longer create an ignition, or a faulty internal component failing to send the 'start' signal.
This fault is more common during the first cold snap of autumn when internal components that have been idle over summer seize up or fail upon restart.
DIY fix possible
Check if other gas appliances, like a hob, are working to confirm gas supplyVerify that your prepaid gas meter (if applicable) has creditPress the reset button or turn the control knob to 'Reset' for 2 seconds
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Gas Safe Register →Ideal models that show the Lack of burner ignition fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Lack of burner ignition 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