BoilerFaultCodesIdeal Neon2 Fault Code
Also written as NEON2 — same fault.
The Ideal Neon2 fault code means: your boiler is failing to start because the internal fan is not spinning correctly or the control board cannot confirm it is working.. It appears on 2 Ideal models in our database.
Technical description: Fan voltage indication
What causes the Ideal Neon2 fault?
This fault occurs when the boiler's control board sends power to the fan but does not receive the necessary electrical feedback to confirm it is spinning safely. The most common reasons are a seized fan motor due to age, a perished vacuum tube, or a failing computer board that can no longer process the fan's signal.
This fault is slightly more common in winter when the fan has to work harder to overcome heavy winds or when cold dampness affects aging electrical components.
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 →Ideal models that show the Neon2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal Neon2 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