BoilerFaultCodesIdeal LED 2 ON Fault Code
Also written as LED2ON — same fault.
The Ideal LED 2 ON fault code means: your boiler is failing to light the gas flame and has shut itself down for safety.. It appears on 1 Ideal model in our database.
Technical description: Flame is not detected. The spark stops, the gas valve closes, and the fan continues to run.
What causes the Ideal LED 2 ON fault?
This fault occurs when the boiler attempts to start up but cannot confirm that a flame has successfully lit. The most common reasons are a worn-out ignition spark that fails to catch the gas, or a dirty sensor that cannot 'see' the flame even after it has started. It can also be caused by a lack of gas reaching the unit due to a faulty internal valve.
DIY fix possible
Check that your gas supply is turned on and other gas appliances are workingPress and hold the reset button for several seconds to restart the ignition sequenceCheck outside to ensure the white condensate pipe hasn't frozen in cold weather
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Search the official register for a qualified engineer in your area.
Gas Safe Register →Ideal models that show the LED 2 ON fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal LED 2 ON 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