BoilerFaultCodes
Ikon Boiler Fault Codes
6 fault codes across 1 Ikon boiler models — explained in plain English.
Ikon boilers (Glow-worm/Hepworth-built).
Ikon fault codes on this site
We document 6 fault codes across 1 Ikon model, covering 6 distinct codes. Ikon boilers use light sequences and status descriptions rather than numbered codes. Codes for 1 of these models are taken directly from the manufacturer's own service or installation manual. Ikon is a smaller name in the UK market, and if you own one this is likely one of the few places its fault codes are collected in one place.
Models covered: 40-50 CI.
Codes that appear on the most Ikon models:
High-severity Ikon fault codes
F1 F2 Neon 1 not lit Neon 2 not lit Neon 3 not lit
Your boiler has lost power internally due to a blown safety fuse on the main control board, which has caused the unit to shut down completely.
40-50 CI
Your boiler has likely stopped working because an internal electrical fuse has blown, often because the pump that moves water around your system has jammed or failed.
40-50 CI
Your boiler is not receiving power, which could be due to a simple external electricity issue or an internal fuse failure.
40-50 CI
Your boiler has switched itself off because it has gotten too hot, likely due to a circulation issue or a faulty internal sensor.
40-50 CI
Your boiler has detected an issue with the ventilation system and has shut down as a safety precaution to ensure exhaust gases are being cleared correctly.
40-50 CI
All models
1 Ikon boiler models
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