High
Neon 1 on Ideal Classic RS

Your boiler has detected that the internal fan system is already running or the air sensor is stuck before it should be, preventing the boiler from starting its ignition sequence safely.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Air pressure switch made.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

Neon 2View →Neon 3View →

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