BoilerFaultCodesIdeal LED 2 OFF briefly Fault Code
Also written as LED2OFFBRIEFLY — same fault.
The Ideal LED 2 OFF briefly fault code means: your boiler is trying to start the flame but the spark system isn't working correctly, preventing it from firing up.. It appears on 1 Ideal model in our database.
Technical description: Ignition trial period; check for mains voltage on Board 37 terminals for the spark generator
What causes the Ideal LED 2 OFF briefly fault?
This fault occurs when the boiler's internal computer signals for a fire to start, but no spark is physically produced to light the gas. The most common reason is that the spark generator has failed electrically or the ignition electrodes have become worn or covered in carbon soot. In some cases, the control board may simply be failing to send the necessary power to the ignition system.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the LED 2 OFF briefly fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal LED 2 OFF briefly 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