Neon l2 Low

Ideal Neon l2 Fault Code

Also written as NEONL2 — same fault.

The Ideal Neon l2 fault code means: your boiler is correctly receiving a signal from the thermostat that the house needs heat, but it has not yet started the ignition process to fire up.. It appears on 1 Ideal model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Boiler thermostat calling for heat
Typical repair cost £0-120 (including labour)

DIY fix possible

Check that the room thermostat is turned up higher than the current room temperatureEnsure any external programmers or timers are set to 'On' or 'Auto'Wait a few minutes to see if the boiler begins its normal start-up sequence

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Ideal models that show the Neon l2 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal Neon l2 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